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Finding the Fourth Proportional to 610.38, 912.87 and 542.34

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Solution

The fourth proportional to 610.38, 912.87 and 542.34 is: 811.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.38 : 912.87 = 542.34 : x
  2. Step 2: Convert to fraction form
    610.38/912.87 = 542.34/x
  3. Step 3: Cross multiply
    610.38x = 912.87 × 542.34
  4. Step 4: Simplify right side
    610.38x = 495,085.92
  5. Step 5: Solve for x
    x = 495,085.92/610.38
  6. Step 6: Final answer
    x = 811.11

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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.