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Finding the Fourth Proportional to 658.01, 988.08 and 427.47

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Solution

The fourth proportional to 658.01, 988.08 and 427.47 is: 641.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.01 : 988.08 = 427.47 : x
  2. Step 2: Convert to fraction form
    658.01/988.08 = 427.47/x
  3. Step 3: Cross multiply
    658.01x = 988.08 × 427.47
  4. Step 4: Simplify right side
    658.01x = 422,374.56
  5. Step 5: Solve for x
    x = 422,374.56/658.01
  6. Step 6: Final answer
    x = 641.90

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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.