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Finding the Fourth Proportional to 773.20, 1,158.60 and 650.80

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Solution

The fourth proportional to 773.20, 1,158.60 and 650.80 is: 975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.20 : 1,158.60 = 650.80 : x
  2. Step 2: Convert to fraction form
    773.20/1,158.60 = 650.80/x
  3. Step 3: Cross multiply
    773.20x = 1,158.60 × 650.80
  4. Step 4: Simplify right side
    773.20x = 754,016.88
  5. Step 5: Solve for x
    x = 754,016.88/773.20
  6. Step 6: Final answer
    x = 975.19

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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.