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Finding the Fourth Proportional to 279,290.08, 418,948.04 and 79,624

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Solution

The fourth proportional to 279,290.08, 418,948.04 and 79,624 is: 119,439.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,290.08 : 418,948.04 = 79,624 : x
  2. Step 2: Convert to fraction form
    279,290.08/418,948.04 = 79,624/x
  3. Step 3: Cross multiply
    279,290.08x = 418,948.04 × 79,624
  4. Step 4: Simplify right side
    279,290.08x = 33,358,318,736.96
  5. Step 5: Solve for x
    x = 33,358,318,736.96/279,290.08
  6. Step 6: Final answer
    x = 119,439.68

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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.