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Finding the Fourth Proportional to 655.56, 987.76 and 542.52

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Solution

The fourth proportional to 655.56, 987.76 and 542.52 is: 817.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 987.76 = 542.52 : x
  2. Step 2: Convert to fraction form
    655.56/987.76 = 542.52/x
  3. Step 3: Cross multiply
    655.56x = 987.76 × 542.52
  4. Step 4: Simplify right side
    655.56x = 535,879.56
  5. Step 5: Solve for x
    x = 535,879.56/655.56
  6. Step 6: Final answer
    x = 817.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.