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Finding the Fourth Proportional to 757.65, 1,135.28 and 551.27

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Solution

The fourth proportional to 757.65, 1,135.28 and 551.27 is: 826.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.65 : 1,135.28 = 551.27 : x
  2. Step 2: Convert to fraction form
    757.65/1,135.28 = 551.27/x
  3. Step 3: Cross multiply
    757.65x = 1,135.28 × 551.27
  4. Step 4: Simplify right side
    757.65x = 625,850.02
  5. Step 5: Solve for x
    x = 625,850.02/757.65
  6. Step 6: Final answer
    x = 826.04

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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.