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Finding the Fourth Proportional to 449.93, 621.24 and 351.51

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Solution

The fourth proportional to 449.93, 621.24 and 351.51 is: 485.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.93 : 621.24 = 351.51 : x
  2. Step 2: Convert to fraction form
    449.93/621.24 = 351.51/x
  3. Step 3: Cross multiply
    449.93x = 621.24 × 351.51
  4. Step 4: Simplify right side
    449.93x = 218,372.07
  5. Step 5: Solve for x
    x = 218,372.07/449.93
  6. Step 6: Final answer
    x = 485.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.