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Finding the Fourth Proportional to 658.23, 987.34 and 369.87

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Solution

The fourth proportional to 658.23, 987.34 and 369.87 is: 554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.23 : 987.34 = 369.87 : x
  2. Step 2: Convert to fraction form
    658.23/987.34 = 369.87/x
  3. Step 3: Cross multiply
    658.23x = 987.34 × 369.87
  4. Step 4: Simplify right side
    658.23x = 365,180.66
  5. Step 5: Solve for x
    x = 365,180.66/658.23
  6. Step 6: Final answer
    x = 554.80

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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.