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Finding the Fourth Proportional to 751.50, 1,127.52 and 691.56

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Solution

The fourth proportional to 751.50, 1,127.52 and 691.56 is: 1,037.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.50 : 1,127.52 = 691.56 : x
  2. Step 2: Convert to fraction form
    751.50/1,127.52 = 691.56/x
  3. Step 3: Cross multiply
    751.50x = 1,127.52 × 691.56
  4. Step 4: Simplify right side
    751.50x = 779,747.73
  5. Step 5: Solve for x
    x = 779,747.73/751.50
  6. Step 6: Final answer
    x = 1,037.59

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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.