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Finding the Fourth Proportional to 621.97, 932.55 and 416.68

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Solution

The fourth proportional to 621.97, 932.55 and 416.68 is: 624.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.97 : 932.55 = 416.68 : x
  2. Step 2: Convert to fraction form
    621.97/932.55 = 416.68/x
  3. Step 3: Cross multiply
    621.97x = 932.55 × 416.68
  4. Step 4: Simplify right side
    621.97x = 388,574.93
  5. Step 5: Solve for x
    x = 388,574.93/621.97
  6. Step 6: Final answer
    x = 624.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.