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Finding the Fourth Proportional to 658.58, 987.88 and 384.49

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Solution

The fourth proportional to 658.58, 987.88 and 384.49 is: 576.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.58 : 987.88 = 384.49 : x
  2. Step 2: Convert to fraction form
    658.58/987.88 = 384.49/x
  3. Step 3: Cross multiply
    658.58x = 987.88 × 384.49
  4. Step 4: Simplify right side
    658.58x = 379,825.04
  5. Step 5: Solve for x
    x = 379,825.04/658.58
  6. Step 6: Final answer
    x = 576.73

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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.