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Finding the Fourth Proportional to 627.27, 938.93 and 431.12

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Solution

The fourth proportional to 627.27, 938.93 and 431.12 is: 645.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.27 : 938.93 = 431.12 : x
  2. Step 2: Convert to fraction form
    627.27/938.93 = 431.12/x
  3. Step 3: Cross multiply
    627.27x = 938.93 × 431.12
  4. Step 4: Simplify right side
    627.27x = 404,784.65
  5. Step 5: Solve for x
    x = 404,784.65/627.27
  6. Step 6: Final answer
    x = 645.32

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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.