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Finding the Fourth Proportional to 627.71, 865.65 and 406.41

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Solution

The fourth proportional to 627.71, 865.65 and 406.41 is: 560.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.71 : 865.65 = 406.41 : x
  2. Step 2: Convert to fraction form
    627.71/865.65 = 406.41/x
  3. Step 3: Cross multiply
    627.71x = 865.65 × 406.41
  4. Step 4: Simplify right side
    627.71x = 351,807.09
  5. Step 5: Solve for x
    x = 351,807.09/627.71
  6. Step 6: Final answer
    x = 560.47

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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.