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Finding the Fourth Proportional to 888.87, 1,330.68 and 658.80

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Solution

The fourth proportional to 888.87, 1,330.68 and 658.80 is: 986.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.87 : 1,330.68 = 658.80 : x
  2. Step 2: Convert to fraction form
    888.87/1,330.68 = 658.80/x
  3. Step 3: Cross multiply
    888.87x = 1,330.68 × 658.80
  4. Step 4: Simplify right side
    888.87x = 876,651.98
  5. Step 5: Solve for x
    x = 876,651.98/888.87
  6. Step 6: Final answer
    x = 986.25

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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.