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Finding the Fourth Proportional to 743.46, 1,027.94 and 731.78

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Solution

The fourth proportional to 743.46, 1,027.94 and 731.78 is: 1,011.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.46 : 1,027.94 = 731.78 : x
  2. Step 2: Convert to fraction form
    743.46/1,027.94 = 731.78/x
  3. Step 3: Cross multiply
    743.46x = 1,027.94 × 731.78
  4. Step 4: Simplify right side
    743.46x = 752,225.93
  5. Step 5: Solve for x
    x = 752,225.93/743.46
  6. Step 6: Final answer
    x = 1,011.79

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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.