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Finding the Fourth Proportional to 754.06, 1,129.27 and 667.49

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Solution

The fourth proportional to 754.06, 1,129.27 and 667.49 is: 999.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.06 : 1,129.27 = 667.49 : x
  2. Step 2: Convert to fraction form
    754.06/1,129.27 = 667.49/x
  3. Step 3: Cross multiply
    754.06x = 1,129.27 × 667.49
  4. Step 4: Simplify right side
    754.06x = 753,774.84
  5. Step 5: Solve for x
    x = 753,774.84/754.06
  6. Step 6: Final answer
    x = 999.62

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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.