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Finding the Fourth Proportional to 381,847.80, 572,766.30 and 129,074.40

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Solution

The fourth proportional to 381,847.80, 572,766.30 and 129,074.40 is: 193,609.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,847.80 : 572,766.30 = 129,074.40 : x
  2. Step 2: Convert to fraction form
    381,847.80/572,766.30 = 129,074.40/x
  3. Step 3: Cross multiply
    381,847.80x = 572,766.30 × 129,074.40
  4. Step 4: Simplify right side
    381,847.80x = 73,929,466,512.72
  5. Step 5: Solve for x
    x = 73,929,466,512.72/381,847.80
  6. Step 6: Final answer
    x = 193,609.77

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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.