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Finding the Fourth Proportional to 512.61, 764.92 and 457.39

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Solution

The fourth proportional to 512.61, 764.92 and 457.39 is: 682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.61 : 764.92 = 457.39 : x
  2. Step 2: Convert to fraction form
    512.61/764.92 = 457.39/x
  3. Step 3: Cross multiply
    512.61x = 764.92 × 457.39
  4. Step 4: Simplify right side
    512.61x = 349,861.60
  5. Step 5: Solve for x
    x = 349,861.60/512.61
  6. Step 6: Final answer
    x = 682.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.