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Finding the Fourth Proportional to 326,625.87, 489,479.32 and 259,769.28

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Solution

The fourth proportional to 326,625.87, 489,479.32 and 259,769.28 is: 389,288.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,625.87 : 489,479.32 = 259,769.28 : x
  2. Step 2: Convert to fraction form
    326,625.87/489,479.32 = 259,769.28/x
  3. Step 3: Cross multiply
    326,625.87x = 489,479.32 × 259,769.28
  4. Step 4: Simplify right side
    326,625.87x = 127,151,690,531.29
  5. Step 5: Solve for x
    x = 127,151,690,531.29/326,625.87
  6. Step 6: Final answer
    x = 389,288.49

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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.