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Finding the Fourth Proportional to 542.56, 812.28 and 411.80

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Solution

The fourth proportional to 542.56, 812.28 and 411.80 is: 616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.56 : 812.28 = 411.80 : x
  2. Step 2: Convert to fraction form
    542.56/812.28 = 411.80/x
  3. Step 3: Cross multiply
    542.56x = 812.28 × 411.80
  4. Step 4: Simplify right side
    542.56x = 334,496.90
  5. Step 5: Solve for x
    x = 334,496.90/542.56
  6. Step 6: Final answer
    x = 616.52

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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.