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Finding the Fourth Proportional to 279,422.40, 419,101.20 and 79,773.60

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Solution

The fourth proportional to 279,422.40, 419,101.20 and 79,773.60 is: 119,651.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,422.40 : 419,101.20 = 79,773.60 : x
  2. Step 2: Convert to fraction form
    279,422.40/419,101.20 = 79,773.60/x
  3. Step 3: Cross multiply
    279,422.40x = 419,101.20 × 79,773.60
  4. Step 4: Simplify right side
    279,422.40x = 33,433,211,488.32
  5. Step 5: Solve for x
    x = 33,433,211,488.32/279,422.40
  6. Step 6: Final answer
    x = 119,651.15

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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.