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Finding the Fourth Proportional to 326,278.60, 489,029.10 and 136,738.60

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Solution

The fourth proportional to 326,278.60, 489,029.10 and 136,738.60 is: 204,944.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,278.60 : 489,029.10 = 136,738.60 : x
  2. Step 2: Convert to fraction form
    326,278.60/489,029.10 = 136,738.60/x
  3. Step 3: Cross multiply
    326,278.60x = 489,029.10 × 136,738.60
  4. Step 4: Simplify right side
    326,278.60x = 66,869,154,493.26
  5. Step 5: Solve for x
    x = 66,869,154,493.26/326,278.60
  6. Step 6: Final answer
    x = 204,944.96

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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.