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Finding the Fourth Proportional to 326,249.85, 489,374.78 and 215,441.85

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Solution

The fourth proportional to 326,249.85, 489,374.78 and 215,441.85 is: 323,162.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,249.85 : 489,374.78 = 215,441.85 : x
  2. Step 2: Convert to fraction form
    326,249.85/489,374.78 = 215,441.85/x
  3. Step 3: Cross multiply
    326,249.85x = 489,374.78 × 215,441.85
  4. Step 4: Simplify right side
    326,249.85x = 105,431,806,869.33
  5. Step 5: Solve for x
    x = 105,431,806,869.33/326,249.85
  6. Step 6: Final answer
    x = 323,162.78

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1.5x scale

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.