Home / 280,542.20-387,150.71-159,691.28

Finding the Fourth Proportional to 280,542.20, 387,150.71 and 159,691.28

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Solution

The fourth proportional to 280,542.20, 387,150.71 and 159,691.28 is: 220,375.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,542.20 : 387,150.71 = 159,691.28 : x
  2. Step 2: Convert to fraction form
    280,542.20/387,150.71 = 159,691.28/x
  3. Step 3: Cross multiply
    280,542.20x = 387,150.71 × 159,691.28
  4. Step 4: Simplify right side
    280,542.20x = 61,824,589,698.60
  5. Step 5: Solve for x
    x = 61,824,589,698.60/280,542.20
  6. Step 6: Final answer
    x = 220,375.37

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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.