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Finding the Fourth Proportional to 2,671.92, 4,007.28 and 723.96

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Solution

The fourth proportional to 2,671.92, 4,007.28 and 723.96 is: 1,085.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.92 : 4,007.28 = 723.96 : x
  2. Step 2: Convert to fraction form
    2,671.92/4,007.28 = 723.96/x
  3. Step 3: Cross multiply
    2,671.92x = 4,007.28 × 723.96
  4. Step 4: Simplify right side
    2,671.92x = 2,901,110.43
  5. Step 5: Solve for x
    x = 2,901,110.43/2,671.92
  6. Step 6: Final answer
    x = 1,085.78

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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.