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Finding the Fourth Proportional to 758.06, 1,135.17 and 432.86

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Solution

The fourth proportional to 758.06, 1,135.17 and 432.86 is: 648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.06 : 1,135.17 = 432.86 : x
  2. Step 2: Convert to fraction form
    758.06/1,135.17 = 432.86/x
  3. Step 3: Cross multiply
    758.06x = 1,135.17 × 432.86
  4. Step 4: Simplify right side
    758.06x = 491,369.69
  5. Step 5: Solve for x
    x = 491,369.69/758.06
  6. Step 6: Final answer
    x = 648.19

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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.