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Finding the Fourth Proportional to 280,168.92, 420,256.24 and 80,488.80

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Solution

The fourth proportional to 280,168.92, 420,256.24 and 80,488.80 is: 120,734.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,168.92 : 420,256.24 = 80,488.80 : x
  2. Step 2: Convert to fraction form
    280,168.92/420,256.24 = 80,488.80/x
  3. Step 3: Cross multiply
    280,168.92x = 420,256.24 × 80,488.80
  4. Step 4: Simplify right side
    280,168.92x = 33,825,920,450.11
  5. Step 5: Solve for x
    x = 33,825,920,450.11/280,168.92
  6. Step 6: Final answer
    x = 120,734.02

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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.