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Finding the Fourth Proportional to 279,215.43, 418,823.21 and 195,139.79

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Solution

The fourth proportional to 279,215.43, 418,823.21 and 195,139.79 is: 292,709.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,215.43 : 418,823.21 = 195,139.79 : x
  2. Step 2: Convert to fraction form
    279,215.43/418,823.21 = 195,139.79/x
  3. Step 3: Cross multiply
    279,215.43x = 418,823.21 × 195,139.79
  4. Step 4: Simplify right side
    279,215.43x = 81,729,073,246.53
  5. Step 5: Solve for x
    x = 81,729,073,246.53/279,215.43
  6. Step 6: Final answer
    x = 292,709.73

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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.