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Finding the Fourth Proportional to 1,151.47, 1,725.91 and 756.91

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Solution

The fourth proportional to 1,151.47, 1,725.91 and 756.91 is: 1,134.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.47 : 1,725.91 = 756.91 : x
  2. Step 2: Convert to fraction form
    1,151.47/1,725.91 = 756.91/x
  3. Step 3: Cross multiply
    1,151.47x = 1,725.91 × 756.91
  4. Step 4: Simplify right side
    1,151.47x = 1,306,358.54
  5. Step 5: Solve for x
    x = 1,306,358.54/1,151.47
  6. Step 6: Final answer
    x = 1,134.51

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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.