Home / 744,439.20-1,115,427.60-428,344.80

Finding the Fourth Proportional to 744,439.20, 1,115,427.60 and 428,344.80

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Solution

The fourth proportional to 744,439.20, 1,115,427.60 and 428,344.80 is: 641,808.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,439.20 : 1,115,427.60 = 428,344.80 : x
  2. Step 2: Convert to fraction form
    744,439.20/1,115,427.60 = 428,344.80/x
  3. Step 3: Cross multiply
    744,439.20x = 1,115,427.60 × 428,344.80
  4. Step 4: Simplify right side
    744,439.20x = 477,787,612,236.48
  5. Step 5: Solve for x
    x = 477,787,612,236.48/744,439.20
  6. Step 6: Final answer
    x = 641,808.78

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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.