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Finding the Fourth Proportional to 625.74, 936.78 and 440.01

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Solution

The fourth proportional to 625.74, 936.78 and 440.01 is: 658.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.74 : 936.78 = 440.01 : x
  2. Step 2: Convert to fraction form
    625.74/936.78 = 440.01/x
  3. Step 3: Cross multiply
    625.74x = 936.78 × 440.01
  4. Step 4: Simplify right side
    625.74x = 412,192.57
  5. Step 5: Solve for x
    x = 412,192.57/625.74
  6. Step 6: Final answer
    x = 658.73

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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.