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Finding the Fourth Proportional to 766.80, 1,149.39 and 550.26

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Solution

The fourth proportional to 766.80, 1,149.39 and 550.26 is: 824.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.80 : 1,149.39 = 550.26 : x
  2. Step 2: Convert to fraction form
    766.80/1,149.39 = 550.26/x
  3. Step 3: Cross multiply
    766.80x = 1,149.39 × 550.26
  4. Step 4: Simplify right side
    766.80x = 632,463.34
  5. Step 5: Solve for x
    x = 632,463.34/766.80
  6. Step 6: Final answer
    x = 824.81

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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.