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Finding the Fourth Proportional to 658.98, 988.28 and 196.74

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Solution

The fourth proportional to 658.98, 988.28 and 196.74 is: 295.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.98 : 988.28 = 196.74 : x
  2. Step 2: Convert to fraction form
    658.98/988.28 = 196.74/x
  3. Step 3: Cross multiply
    658.98x = 988.28 × 196.74
  4. Step 4: Simplify right side
    658.98x = 194,434.21
  5. Step 5: Solve for x
    x = 194,434.21/658.98
  6. Step 6: Final answer
    x = 295.05

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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.