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Finding the Fourth Proportional to 326,870.76, 489,863.22 and 169,209.90

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Solution

The fourth proportional to 326,870.76, 489,863.22 and 169,209.90 is: 253,585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,870.76 : 489,863.22 = 169,209.90 : x
  2. Step 2: Convert to fraction form
    326,870.76/489,863.22 = 169,209.90/x
  3. Step 3: Cross multiply
    326,870.76x = 489,863.22 × 169,209.90
  4. Step 4: Simplify right side
    326,870.76x = 82,889,706,469.88
  5. Step 5: Solve for x
    x = 82,889,706,469.88/326,870.76
  6. Step 6: Final answer
    x = 253,585.57

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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.