Home / 311,221.28-428,581.42-270,366.76

Finding the Fourth Proportional to 311,221.28, 428,581.42 and 270,366.76

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Solution

The fourth proportional to 311,221.28, 428,581.42 and 270,366.76 is: 372,320.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,221.28 : 428,581.42 = 270,366.76 : x
  2. Step 2: Convert to fraction form
    311,221.28/428,581.42 = 270,366.76/x
  3. Step 3: Cross multiply
    311,221.28x = 428,581.42 × 270,366.76
  4. Step 4: Simplify right side
    311,221.28x = 115,874,169,921.60
  5. Step 5: Solve for x
    x = 115,874,169,921.60/311,221.28
  6. Step 6: Final answer
    x = 372,320.84

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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.