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Finding the Fourth Proportional to 381,679.80, 572,519.70 and 361,996.80

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Solution

The fourth proportional to 381,679.80, 572,519.70 and 361,996.80 is: 542,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,679.80 : 572,519.70 = 361,996.80 : x
  2. Step 2: Convert to fraction form
    381,679.80/572,519.70 = 361,996.80/x
  3. Step 3: Cross multiply
    381,679.80x = 572,519.70 × 361,996.80
  4. Step 4: Simplify right side
    381,679.80x = 207,250,299,336.96
  5. Step 5: Solve for x
    x = 207,250,299,336.96/381,679.80
  6. Step 6: Final answer
    x = 542,995.20

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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.