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Finding the Fourth Proportional to 279,863.92, 386,207.76 and 152,540.56

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Solution

The fourth proportional to 279,863.92, 386,207.76 and 152,540.56 is: 210,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,863.92 : 386,207.76 = 152,540.56 : x
  2. Step 2: Convert to fraction form
    279,863.92/386,207.76 = 152,540.56/x
  3. Step 3: Cross multiply
    279,863.92x = 386,207.76 × 152,540.56
  4. Step 4: Simplify right side
    279,863.92x = 58,912,347,986.75
  5. Step 5: Solve for x
    x = 58,912,347,986.75/279,863.92
  6. Step 6: Final answer
    x = 210,503.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.