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Finding the Fourth Proportional to 275,691.20, 380,536.36 and 161,000.78

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Solution

The fourth proportional to 275,691.20, 380,536.36 and 161,000.78 is: 222,229.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,691.20 : 380,536.36 = 161,000.78 : x
  2. Step 2: Convert to fraction form
    275,691.20/380,536.36 = 161,000.78/x
  3. Step 3: Cross multiply
    275,691.20x = 380,536.36 × 161,000.78
  4. Step 4: Simplify right side
    275,691.20x = 61,266,648,473.18
  5. Step 5: Solve for x
    x = 61,266,648,473.18/275,691.20
  6. Step 6: Final answer
    x = 222,229.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.