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Finding the Fourth Proportional to 655.24, 987.37 and 542.23

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Solution

The fourth proportional to 655.24, 987.37 and 542.23 is: 817.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.24 : 987.37 = 542.23 : x
  2. Step 2: Convert to fraction form
    655.24/987.37 = 542.23/x
  3. Step 3: Cross multiply
    655.24x = 987.37 × 542.23
  4. Step 4: Simplify right side
    655.24x = 535,377.81
  5. Step 5: Solve for x
    x = 535,377.81/655.24
  6. Step 6: Final answer
    x = 817.07

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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.