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Finding the Fourth Proportional to 630.03, 939.90 and 613.92

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Solution

The fourth proportional to 630.03, 939.90 and 613.92 is: 915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.03 : 939.90 = 613.92 : x
  2. Step 2: Convert to fraction form
    630.03/939.90 = 613.92/x
  3. Step 3: Cross multiply
    630.03x = 939.90 × 613.92
  4. Step 4: Simplify right side
    630.03x = 577,023.41
  5. Step 5: Solve for x
    x = 577,023.41/630.03
  6. Step 6: Final answer
    x = 915.87

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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.