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Finding the Fourth Proportional to 773.09, 1,160.40 and 658.70

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Solution

The fourth proportional to 773.09, 1,160.40 and 658.70 is: 988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.09 : 1,160.40 = 658.70 : x
  2. Step 2: Convert to fraction form
    773.09/1,160.40 = 658.70/x
  3. Step 3: Cross multiply
    773.09x = 1,160.40 × 658.70
  4. Step 4: Simplify right side
    773.09x = 764,355.48
  5. Step 5: Solve for x
    x = 764,355.48/773.09
  6. Step 6: Final answer
    x = 988.70

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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.