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Finding the Fourth Proportional to 735.31, 1,102.91 and 426.97

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Solution

The fourth proportional to 735.31, 1,102.91 and 426.97 is: 640.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.31 : 1,102.91 = 426.97 : x
  2. Step 2: Convert to fraction form
    735.31/1,102.91 = 426.97/x
  3. Step 3: Cross multiply
    735.31x = 1,102.91 × 426.97
  4. Step 4: Simplify right side
    735.31x = 470,910.55
  5. Step 5: Solve for x
    x = 470,910.55/735.31
  6. Step 6: Final answer
    x = 640.42

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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.