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Finding the Fourth Proportional to 386,489.29, 579,773.66 and 133,769.37

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Solution

The fourth proportional to 386,489.29, 579,773.66 and 133,769.37 is: 200,667.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,489.29 : 579,773.66 = 133,769.37 : x
  2. Step 2: Convert to fraction form
    386,489.29/579,773.66 = 133,769.37/x
  3. Step 3: Cross multiply
    386,489.29x = 579,773.66 × 133,769.37
  4. Step 4: Simplify right side
    386,489.29x = 77,555,957,240.79
  5. Step 5: Solve for x
    x = 77,555,957,240.79/386,489.29
  6. Step 6: Final answer
    x = 200,667.80

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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.