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Finding the Fourth Proportional to 625.70, 937.52 and 442.78

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Solution

The fourth proportional to 625.70, 937.52 and 442.78 is: 663.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.70 : 937.52 = 442.78 : x
  2. Step 2: Convert to fraction form
    625.70/937.52 = 442.78/x
  3. Step 3: Cross multiply
    625.70x = 937.52 × 442.78
  4. Step 4: Simplify right side
    625.70x = 415,115.11
  5. Step 5: Solve for x
    x = 415,115.11/625.70
  6. Step 6: Final answer
    x = 663.44

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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.