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Finding the Fourth Proportional to 279,218.52, 418,822.40 and 79,540.20

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Solution

The fourth proportional to 279,218.52, 418,822.40 and 79,540.20 is: 119,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,218.52 : 418,822.40 = 79,540.20 : x
  2. Step 2: Convert to fraction form
    279,218.52/418,822.40 = 79,540.20/x
  3. Step 3: Cross multiply
    279,218.52x = 418,822.40 × 79,540.20
  4. Step 4: Simplify right side
    279,218.52x = 33,313,217,460.48
  5. Step 5: Solve for x
    x = 33,313,217,460.48/279,218.52
  6. Step 6: Final answer
    x = 119,308.77

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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.