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Finding the Fourth Proportional to 280,351.72, 420,591.96 and 80,673.76

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Solution

The fourth proportional to 280,351.72, 420,591.96 and 80,673.76 is: 121,029.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,351.72 : 420,591.96 = 80,673.76 : x
  2. Step 2: Convert to fraction form
    280,351.72/420,591.96 = 80,673.76/x
  3. Step 3: Cross multiply
    280,351.72x = 420,591.96 × 80,673.76
  4. Step 4: Simplify right side
    280,351.72x = 33,930,734,838.97
  5. Step 5: Solve for x
    x = 33,930,734,838.97/280,351.72
  6. Step 6: Final answer
    x = 121,029.17

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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.