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Finding the Fourth Proportional to 625.60, 937.68 and 517.60

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Solution

The fourth proportional to 625.60, 937.68 and 517.60 is: 775.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.60 : 937.68 = 517.60 : x
  2. Step 2: Convert to fraction form
    625.60/937.68 = 517.60/x
  3. Step 3: Cross multiply
    625.60x = 937.68 × 517.60
  4. Step 4: Simplify right side
    625.60x = 485,343.17
  5. Step 5: Solve for x
    x = 485,343.17/625.60
  6. Step 6: Final answer
    x = 775.80

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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.