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Finding the Fourth Proportional to 3,432.80, 5,149.20 and 2,914.40

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Solution

The fourth proportional to 3,432.80, 5,149.20 and 2,914.40 is: 4,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,432.80 : 5,149.20 = 2,914.40 : x
  2. Step 2: Convert to fraction form
    3,432.80/5,149.20 = 2,914.40/x
  3. Step 3: Cross multiply
    3,432.80x = 5,149.20 × 2,914.40
  4. Step 4: Simplify right side
    3,432.80x = 15,006,828.48
  5. Step 5: Solve for x
    x = 15,006,828.48/3,432.80
  6. Step 6: Final answer
    x = 4,371.60

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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.