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Finding the Fourth Proportional to 754.36, 1,125.67 and 672.64

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Solution

The fourth proportional to 754.36, 1,125.67 and 672.64 is: 1,003.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.36 : 1,125.67 = 672.64 : x
  2. Step 2: Convert to fraction form
    754.36/1,125.67 = 672.64/x
  3. Step 3: Cross multiply
    754.36x = 1,125.67 × 672.64
  4. Step 4: Simplify right side
    754.36x = 757,170.67
  5. Step 5: Solve for x
    x = 757,170.67/754.36
  6. Step 6: Final answer
    x = 1,003.73

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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.