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Finding the Fourth Proportional to 279,387.90, 419,081.85 and 201,239.10

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Solution

The fourth proportional to 279,387.90, 419,081.85 and 201,239.10 is: 301,858.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,387.90 : 419,081.85 = 201,239.10 : x
  2. Step 2: Convert to fraction form
    279,387.90/419,081.85 = 201,239.10/x
  3. Step 3: Cross multiply
    279,387.90x = 419,081.85 × 201,239.10
  4. Step 4: Simplify right side
    279,387.90x = 84,335,654,320.34
  5. Step 5: Solve for x
    x = 84,335,654,320.34/279,387.90
  6. Step 6: Final answer
    x = 301,858.65

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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.