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Finding the Fourth Proportional to 258,082.60, 386,663.10 and 218,453.80

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Solution

The fourth proportional to 258,082.60, 386,663.10 and 218,453.80 is: 327,290.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,082.60 : 386,663.10 = 218,453.80 : x
  2. Step 2: Convert to fraction form
    258,082.60/386,663.10 = 218,453.80/x
  3. Step 3: Cross multiply
    258,082.60x = 386,663.10 × 218,453.80
  4. Step 4: Simplify right side
    258,082.60x = 84,468,023,514.78
  5. Step 5: Solve for x
    x = 84,468,023,514.78/258,082.60
  6. Step 6: Final answer
    x = 327,290.66

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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.