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Finding the Fourth Proportional to 386,119.78, 579,201.71 and 129,849.48

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Solution

The fourth proportional to 386,119.78, 579,201.71 and 129,849.48 is: 194,781.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,119.78 : 579,201.71 = 129,849.48 : x
  2. Step 2: Convert to fraction form
    386,119.78/579,201.71 = 129,849.48/x
  3. Step 3: Cross multiply
    386,119.78x = 579,201.71 × 129,849.48
  4. Step 4: Simplify right side
    386,119.78x = 75,209,040,209.36
  5. Step 5: Solve for x
    x = 75,209,040,209.36/386,119.78
  6. Step 6: Final answer
    x = 194,781.63

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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.