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Finding the Fourth Proportional to 659.52, 989.10 and 197.17

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Solution

The fourth proportional to 659.52, 989.10 and 197.17 is: 295.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.52 : 989.10 = 197.17 : x
  2. Step 2: Convert to fraction form
    659.52/989.10 = 197.17/x
  3. Step 3: Cross multiply
    659.52x = 989.10 × 197.17
  4. Step 4: Simplify right side
    659.52x = 195,020.85
  5. Step 5: Solve for x
    x = 195,020.85/659.52
  6. Step 6: Final answer
    x = 295.70

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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.