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Finding the Fourth Proportional to 773.40, 1,160.10 and 672.15

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Solution

The fourth proportional to 773.40, 1,160.10 and 672.15 is: 1,008.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.40 : 1,160.10 = 672.15 : x
  2. Step 2: Convert to fraction form
    773.40/1,160.10 = 672.15/x
  3. Step 3: Cross multiply
    773.40x = 1,160.10 × 672.15
  4. Step 4: Simplify right side
    773.40x = 779,761.22
  5. Step 5: Solve for x
    x = 779,761.22/773.40
  6. Step 6: Final answer
    x = 1,008.23

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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.