Home / 345,679.20-518,432.40-132,400.80

Finding the Fourth Proportional to 345,679.20, 518,432.40 and 132,400.80

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Solution

The fourth proportional to 345,679.20, 518,432.40 and 132,400.80 is: 198,568.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,679.20 : 518,432.40 = 132,400.80 : x
  2. Step 2: Convert to fraction form
    345,679.20/518,432.40 = 132,400.80/x
  3. Step 3: Cross multiply
    345,679.20x = 518,432.40 × 132,400.80
  4. Step 4: Simplify right side
    345,679.20x = 68,640,864,505.92
  5. Step 5: Solve for x
    x = 68,640,864,505.92/345,679.20
  6. Step 6: Final answer
    x = 198,568.11

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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.