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Finding the Fourth Proportional to 757.39, 1,135.25 and 432.04

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Solution

The fourth proportional to 757.39, 1,135.25 and 432.04 is: 647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.39 : 1,135.25 = 432.04 : x
  2. Step 2: Convert to fraction form
    757.39/1,135.25 = 432.04/x
  3. Step 3: Cross multiply
    757.39x = 1,135.25 × 432.04
  4. Step 4: Simplify right side
    757.39x = 490,465.57
  5. Step 5: Solve for x
    x = 490,465.57/757.39
  6. Step 6: Final answer
    x = 647.58

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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.