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Finding the Fourth Proportional to 280,290.90, 420,508.32 and 80,626.92

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Solution

The fourth proportional to 280,290.90, 420,508.32 and 80,626.92 is: 120,961.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,290.90 : 420,508.32 = 80,626.92 : x
  2. Step 2: Convert to fraction form
    280,290.90/420,508.32 = 80,626.92/x
  3. Step 3: Cross multiply
    280,290.90x = 420,508.32 × 80,626.92
  4. Step 4: Simplify right side
    280,290.90x = 33,904,290,675.97
  5. Step 5: Solve for x
    x = 33,904,290,675.97/280,290.90
  6. Step 6: Final answer
    x = 120,961.08

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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.