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Finding the Fourth Proportional to 630.92, 871.02 and 548.91

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Solution

The fourth proportional to 630.92, 871.02 and 548.91 is: 757.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.92 : 871.02 = 548.91 : x
  2. Step 2: Convert to fraction form
    630.92/871.02 = 548.91/x
  3. Step 3: Cross multiply
    630.92x = 871.02 × 548.91
  4. Step 4: Simplify right side
    630.92x = 478,111.59
  5. Step 5: Solve for x
    x = 478,111.59/630.92
  6. Step 6: Final answer
    x = 757.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.