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Finding the Fourth Proportional to 267,391.80, 401,145.30 and 80,422.20

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Solution

The fourth proportional to 267,391.80, 401,145.30 and 80,422.20 is: 120,650.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,391.80 : 401,145.30 = 80,422.20 : x
  2. Step 2: Convert to fraction form
    267,391.80/401,145.30 = 80,422.20/x
  3. Step 3: Cross multiply
    267,391.80x = 401,145.30 × 80,422.20
  4. Step 4: Simplify right side
    267,391.80x = 32,260,987,545.66
  5. Step 5: Solve for x
    x = 32,260,987,545.66/267,391.80
  6. Step 6: Final answer
    x = 120,650.62

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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.