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Finding the Fourth Proportional to 658.88, 987.99 and 242.39

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Solution

The fourth proportional to 658.88, 987.99 and 242.39 is: 363.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.88 : 987.99 = 242.39 : x
  2. Step 2: Convert to fraction form
    658.88/987.99 = 242.39/x
  3. Step 3: Cross multiply
    658.88x = 987.99 × 242.39
  4. Step 4: Simplify right side
    658.88x = 239,482.16
  5. Step 5: Solve for x
    x = 239,482.16/658.88
  6. Step 6: Final answer
    x = 363.47

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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.