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Finding the Fourth Proportional to 655.04, 987.08 and 542.04

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Solution

The fourth proportional to 655.04, 987.08 and 542.04 is: 816.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.04 : 987.08 = 542.04 : x
  2. Step 2: Convert to fraction form
    655.04/987.08 = 542.04/x
  3. Step 3: Cross multiply
    655.04x = 987.08 × 542.04
  4. Step 4: Simplify right side
    655.04x = 535,030.43
  5. Step 5: Solve for x
    x = 535,030.43/655.04
  6. Step 6: Final answer
    x = 816.79

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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.