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Finding the Fourth Proportional to 658.72, 986.40 and 550.24

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Solution

The fourth proportional to 658.72, 986.40 and 550.24 is: 823.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.72 : 986.40 = 550.24 : x
  2. Step 2: Convert to fraction form
    658.72/986.40 = 550.24/x
  3. Step 3: Cross multiply
    658.72x = 986.40 × 550.24
  4. Step 4: Simplify right side
    658.72x = 542,756.74
  5. Step 5: Solve for x
    x = 542,756.74/658.72
  6. Step 6: Final answer
    x = 823.96

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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.