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Finding the Fourth Proportional to 759.29, 1,138.94 and 434.43

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Solution

The fourth proportional to 759.29, 1,138.94 and 434.43 is: 651.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.29 : 1,138.94 = 434.43 : x
  2. Step 2: Convert to fraction form
    759.29/1,138.94 = 434.43/x
  3. Step 3: Cross multiply
    759.29x = 1,138.94 × 434.43
  4. Step 4: Simplify right side
    759.29x = 494,793.43
  5. Step 5: Solve for x
    x = 494,793.43/759.29
  6. Step 6: Final answer
    x = 651.65

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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.