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Finding the Fourth Proportional to 3,432, 5,139.84 and 2,129.52

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Solution

The fourth proportional to 3,432, 5,139.84 and 2,129.52 is: 3,189.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,432 : 5,139.84 = 2,129.52 : x
  2. Step 2: Convert to fraction form
    3,432/5,139.84 = 2,129.52/x
  3. Step 3: Cross multiply
    3,432x = 5,139.84 × 2,129.52
  4. Step 4: Simplify right side
    3,432x = 10,945,392.08
  5. Step 5: Solve for x
    x = 10,945,392.08/3,432
  6. Step 6: Final answer
    x = 3,189.22

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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.