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Finding the Fourth Proportional to 872.08, 1,201.38 and 747.34

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Solution

The fourth proportional to 872.08, 1,201.38 and 747.34 is: 1,029.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.08 : 1,201.38 = 747.34 : x
  2. Step 2: Convert to fraction form
    872.08/1,201.38 = 747.34/x
  3. Step 3: Cross multiply
    872.08x = 1,201.38 × 747.34
  4. Step 4: Simplify right side
    872.08x = 897,839.33
  5. Step 5: Solve for x
    x = 897,839.33/872.08
  6. Step 6: Final answer
    x = 1,029.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.