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Finding the Fourth Proportional to 326,286.60, 489,608.22 and 126,614.84

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Solution

The fourth proportional to 326,286.60, 489,608.22 and 126,614.84 is: 189,991.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,286.60 : 489,608.22 = 126,614.84 : x
  2. Step 2: Convert to fraction form
    326,286.60/489,608.22 = 126,614.84/x
  3. Step 3: Cross multiply
    326,286.60x = 489,608.22 × 126,614.84
  4. Step 4: Simplify right side
    326,286.60x = 61,991,666,437.98
  5. Step 5: Solve for x
    x = 61,991,666,437.98/326,286.60
  6. Step 6: Final answer
    x = 189,991.46

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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.