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Finding the Fourth Proportional to 658.86, 988.52 and 312.48

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Solution

The fourth proportional to 658.86, 988.52 and 312.48 is: 468.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.86 : 988.52 = 312.48 : x
  2. Step 2: Convert to fraction form
    658.86/988.52 = 312.48/x
  3. Step 3: Cross multiply
    658.86x = 988.52 × 312.48
  4. Step 4: Simplify right side
    658.86x = 308,891.17
  5. Step 5: Solve for x
    x = 308,891.17/658.86
  6. Step 6: Final answer
    x = 468.83

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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.