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Finding the Fourth Proportional to 658.42, 986.95 and 247.30

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Solution

The fourth proportional to 658.42, 986.95 and 247.30 is: 370.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.42 : 986.95 = 247.30 : x
  2. Step 2: Convert to fraction form
    658.42/986.95 = 247.30/x
  3. Step 3: Cross multiply
    658.42x = 986.95 × 247.30
  4. Step 4: Simplify right side
    658.42x = 244,072.74
  5. Step 5: Solve for x
    x = 244,072.74/658.42
  6. Step 6: Final answer
    x = 370.69

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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.