Fidelity Investments conducted an analysis of its investors that have both Individual Retirement Accounts and 401(k) plans. It found that the average combined balance in both accounts was $212,600. Investors on the verge of retirement, or already retired, had a combined balance of $359,000. The analysis also highlighted the sharp increase in the number of Americans seeking guidance as they work to achieve their saving and investing goals.

The report found that individuals who have both types of accounts save a lot more, an average of $10,300 annually, compared to $5,750 a year for 401(k) only and $4,150 for IRA only.

"This unique and integrated analysis covering more than 18 million accounts clearly underscores the importance of using both an IRA and 401(k) to help maximize long-term, tax-deferred growth potential, and as essential complements to other retirement income sources such as Social Security, a pension, annuities and brokerage accounts," said Kathleen Murphy, president of personal investing at Fidelity Investments. "As investors strive to take more control of their personal economy in an unpredictable world, Fidelity's investment professionals work closely with them to understand their priorities and goals, and help them create a tailored plan that can fit their personal situations."