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Finding the Fourth Proportional to 5,760.32, 8,640.42 and 2,639.44

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Solution

The fourth proportional to 5,760.32, 8,640.42 and 2,639.44 is: 3,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,760.32 : 8,640.42 = 2,639.44 : x
  2. Step 2: Convert to fraction form
    5,760.32/8,640.42 = 2,639.44/x
  3. Step 3: Cross multiply
    5,760.32x = 8,640.42 × 2,639.44
  4. Step 4: Simplify right side
    5,760.32x = 22,805,856.97
  5. Step 5: Solve for x
    x = 22,805,856.97/5,760.32
  6. Step 6: Final answer
    x = 3,959.13

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1.5x scale

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.