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Finding the Fourth Proportional to 3,943.28, 5,432.28 and 2,699.12

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Solution

The fourth proportional to 3,943.28, 5,432.28 and 2,699.12 is: 3,718.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.28 : 5,432.28 = 2,699.12 : x
  2. Step 2: Convert to fraction form
    3,943.28/5,432.28 = 2,699.12/x
  3. Step 3: Cross multiply
    3,943.28x = 5,432.28 × 2,699.12
  4. Step 4: Simplify right side
    3,943.28x = 14,662,375.59
  5. Step 5: Solve for x
    x = 14,662,375.59/3,943.28
  6. Step 6: Final answer
    x = 3,718.32

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1.5x scale

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.