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Finding the Fourth Proportional to 326,363.28, 489,568.32 and 136,632.72

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Solution

The fourth proportional to 326,363.28, 489,568.32 and 136,632.72 is: 204,958.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,363.28 : 489,568.32 = 136,632.72 : x
  2. Step 2: Convert to fraction form
    326,363.28/489,568.32 = 136,632.72/x
  3. Step 3: Cross multiply
    326,363.28x = 489,568.32 × 136,632.72
  4. Step 4: Simplify right side
    326,363.28x = 66,891,051,187.43
  5. Step 5: Solve for x
    x = 66,891,051,187.43/326,363.28
  6. Step 6: Final answer
    x = 204,958.88

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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.