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Finding the Fourth Proportional to 280,156.20, 420,234.30 and 80,483.10

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Solution

The fourth proportional to 280,156.20, 420,234.30 and 80,483.10 is: 120,724.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,156.20 : 420,234.30 = 80,483.10 : x
  2. Step 2: Convert to fraction form
    280,156.20/420,234.30 = 80,483.10/x
  3. Step 3: Cross multiply
    280,156.20x = 420,234.30 × 80,483.10
  4. Step 4: Simplify right side
    280,156.20x = 33,821,759,190.33
  5. Step 5: Solve for x
    x = 33,821,759,190.33/280,156.20
  6. Step 6: Final answer
    x = 120,724.65

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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.