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Finding the Fourth Proportional to 625.36, 938.03 and 278.61

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Solution

The fourth proportional to 625.36, 938.03 and 278.61 is: 417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.36 : 938.03 = 278.61 : x
  2. Step 2: Convert to fraction form
    625.36/938.03 = 278.61/x
  3. Step 3: Cross multiply
    625.36x = 938.03 × 278.61
  4. Step 4: Simplify right side
    625.36x = 261,338.46
  5. Step 5: Solve for x
    x = 261,338.46/625.36
  6. Step 6: Final answer
    x = 417.90

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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.