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Finding the Fourth Proportional to 279,327.60, 419,016.10 and 79,643.70

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Solution

The fourth proportional to 279,327.60, 419,016.10 and 79,643.70 is: 119,472.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,327.60 : 419,016.10 = 79,643.70 : x
  2. Step 2: Convert to fraction form
    279,327.60/419,016.10 = 79,643.70/x
  3. Step 3: Cross multiply
    279,327.60x = 419,016.10 × 79,643.70
  4. Step 4: Simplify right side
    279,327.60x = 33,371,992,563.57
  5. Step 5: Solve for x
    x = 33,371,992,563.57/279,327.60
  6. Step 6: Final answer
    x = 119,472.59

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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.