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Finding the Fourth Proportional to 326,493.28, 489,705.36 and 104,860

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Solution

The fourth proportional to 326,493.28, 489,705.36 and 104,860 is: 157,278.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,493.28 : 489,705.36 = 104,860 : x
  2. Step 2: Convert to fraction form
    326,493.28/489,705.36 = 104,860/x
  3. Step 3: Cross multiply
    326,493.28x = 489,705.36 × 104,860
  4. Step 4: Simplify right side
    326,493.28x = 51,350,504,049.60
  5. Step 5: Solve for x
    x = 51,350,504,049.60/326,493.28
  6. Step 6: Final answer
    x = 157,278.90

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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.