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Finding the Fourth Proportional to 520.61, 717.51 and 431.63

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Solution

The fourth proportional to 520.61, 717.51 and 431.63 is: 594.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.61 : 717.51 = 431.63 : x
  2. Step 2: Convert to fraction form
    520.61/717.51 = 431.63/x
  3. Step 3: Cross multiply
    520.61x = 717.51 × 431.63
  4. Step 4: Simplify right side
    520.61x = 309,693.10
  5. Step 5: Solve for x
    x = 309,693.10/520.61
  6. Step 6: Final answer
    x = 594.86

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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.