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Finding the Fourth Proportional to 658.37, 987.72 and 384.65

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Solution

The fourth proportional to 658.37, 987.72 and 384.65 is: 577.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.37 : 987.72 = 384.65 : x
  2. Step 2: Convert to fraction form
    658.37/987.72 = 384.65/x
  3. Step 3: Cross multiply
    658.37x = 987.72 × 384.65
  4. Step 4: Simplify right side
    658.37x = 379,921.56
  5. Step 5: Solve for x
    x = 379,921.56/658.37
  6. Step 6: Final answer
    x = 577.07

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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.