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Finding the Fourth Proportional to 279,215.53, 418,817.89 and 79,537.21

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Solution

The fourth proportional to 279,215.53, 418,817.89 and 79,537.21 is: 119,304.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,215.53 : 418,817.89 = 79,537.21 : x
  2. Step 2: Convert to fraction form
    279,215.53/418,817.89 = 79,537.21/x
  3. Step 3: Cross multiply
    279,215.53x = 418,817.89 × 79,537.21
  4. Step 4: Simplify right side
    279,215.53x = 33,311,606,468.69
  5. Step 5: Solve for x
    x = 33,311,606,468.69/279,215.53
  6. Step 6: Final answer
    x = 119,304.28

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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.