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Finding the Fourth Proportional to 517.43, 775.24 and 431.32

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Solution

The fourth proportional to 517.43, 775.24 and 431.32 is: 646.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.43 : 775.24 = 431.32 : x
  2. Step 2: Convert to fraction form
    517.43/775.24 = 431.32/x
  3. Step 3: Cross multiply
    517.43x = 775.24 × 431.32
  4. Step 4: Simplify right side
    517.43x = 334,370.48
  5. Step 5: Solve for x
    x = 334,370.48/517.43
  6. Step 6: Final answer
    x = 646.22

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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.