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Finding the Fourth Proportional to 655.55, 987.83 and 542.54

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Solution

The fourth proportional to 655.55, 987.83 and 542.54 is: 817.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.55 : 987.83 = 542.54 : x
  2. Step 2: Convert to fraction form
    655.55/987.83 = 542.54/x
  3. Step 3: Cross multiply
    655.55x = 987.83 × 542.54
  4. Step 4: Simplify right side
    655.55x = 535,932.35
  5. Step 5: Solve for x
    x = 535,932.35/655.55
  6. Step 6: Final answer
    x = 817.54

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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.