Home / 280,719.40-387,414.84-159,865.78

Finding the Fourth Proportional to 280,719.40, 387,414.84 and 159,865.78

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Solution

The fourth proportional to 280,719.40, 387,414.84 and 159,865.78 is: 220,627.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,719.40 : 387,414.84 = 159,865.78 : x
  2. Step 2: Convert to fraction form
    280,719.40/387,414.84 = 159,865.78/x
  3. Step 3: Cross multiply
    280,719.40x = 387,414.84 × 159,865.78
  4. Step 4: Simplify right side
    280,719.40x = 61,934,375,580.18
  5. Step 5: Solve for x
    x = 61,934,375,580.18/280,719.40
  6. Step 6: Final answer
    x = 220,627.34

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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.