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Finding the Fourth Proportional to 754.87, 1,129.87 and 673.87

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Solution

The fourth proportional to 754.87, 1,129.87 and 673.87 is: 1,008.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.87 : 1,129.87 = 673.87 : x
  2. Step 2: Convert to fraction form
    754.87/1,129.87 = 673.87/x
  3. Step 3: Cross multiply
    754.87x = 1,129.87 × 673.87
  4. Step 4: Simplify right side
    754.87x = 761,385.50
  5. Step 5: Solve for x
    x = 761,385.50/754.87
  6. Step 6: Final answer
    x = 1,008.63

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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.