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Finding the Fourth Proportional to 279,215.29, 418,759.75 and 79,531.26

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Solution

The fourth proportional to 279,215.29, 418,759.75 and 79,531.26 is: 119,278.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,215.29 : 418,759.75 = 79,531.26 : x
  2. Step 2: Convert to fraction form
    279,215.29/418,759.75 = 79,531.26/x
  3. Step 3: Cross multiply
    279,215.29x = 418,759.75 × 79,531.26
  4. Step 4: Simplify right side
    279,215.29x = 33,304,490,554.79
  5. Step 5: Solve for x
    x = 33,304,490,554.79/279,215.29
  6. Step 6: Final answer
    x = 119,278.89

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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.