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Finding the Fourth Proportional to 757.59, 1,129.62 and 756.11

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Solution

The fourth proportional to 757.59, 1,129.62 and 756.11 is: 1,127.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.59 : 1,129.62 = 756.11 : x
  2. Step 2: Convert to fraction form
    757.59/1,129.62 = 756.11/x
  3. Step 3: Cross multiply
    757.59x = 1,129.62 × 756.11
  4. Step 4: Simplify right side
    757.59x = 854,113.20
  5. Step 5: Solve for x
    x = 854,113.20/757.59
  6. Step 6: Final answer
    x = 1,127.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.