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Finding the Fourth Proportional to 520.34, 717.38 and 431.49

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Solution

The fourth proportional to 520.34, 717.38 and 431.49 is: 594.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.34 : 717.38 = 431.49 : x
  2. Step 2: Convert to fraction form
    520.34/717.38 = 431.49/x
  3. Step 3: Cross multiply
    520.34x = 717.38 × 431.49
  4. Step 4: Simplify right side
    520.34x = 309,538.71
  5. Step 5: Solve for x
    x = 309,538.71/520.34
  6. Step 6: Final answer
    x = 594.88

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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.