Home / 781,969.80-1,079,121.78-442,504.20

Finding the Fourth Proportional to 781,969.80, 1,079,121.78 and 442,504.20

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Solution

The fourth proportional to 781,969.80, 1,079,121.78 and 442,504.20 is: 610,657.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,969.80 : 1,079,121.78 = 442,504.20 : x
  2. Step 2: Convert to fraction form
    781,969.80/1,079,121.78 = 442,504.20/x
  3. Step 3: Cross multiply
    781,969.80x = 1,079,121.78 × 442,504.20
  4. Step 4: Simplify right side
    781,969.80x = 477,515,919,961.48
  5. Step 5: Solve for x
    x = 477,515,919,961.48/781,969.80
  6. Step 6: Final answer
    x = 610,657.75

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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.