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Finding the Fourth Proportional to 339,142.38, 468,018.30 and 211,891.78

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Solution

The fourth proportional to 339,142.38, 468,018.30 and 211,891.78 is: 292,411.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,142.38 : 468,018.30 = 211,891.78 : x
  2. Step 2: Convert to fraction form
    339,142.38/468,018.30 = 211,891.78/x
  3. Step 3: Cross multiply
    339,142.38x = 468,018.30 × 211,891.78
  4. Step 4: Simplify right side
    339,142.38x = 99,169,230,659.57
  5. Step 5: Solve for x
    x = 99,169,230,659.57/339,142.38
  6. Step 6: Final answer
    x = 292,411.79

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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.