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Finding the Fourth Proportional to 280,518.96, 420,679.62 and 80,785.92

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Solution

The fourth proportional to 280,518.96, 420,679.62 and 80,785.92 is: 121,150.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,518.96 : 420,679.62 = 80,785.92 : x
  2. Step 2: Convert to fraction form
    280,518.96/420,679.62 = 80,785.92/x
  3. Step 3: Cross multiply
    280,518.96x = 420,679.62 × 80,785.92
  4. Step 4: Simplify right side
    280,518.96x = 33,984,990,126.95
  5. Step 5: Solve for x
    x = 33,984,990,126.95/280,518.96
  6. Step 6: Final answer
    x = 121,150.42

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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.