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Finding the Fourth Proportional to 326,626.38, 489,748.90 and 126,713.18

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Solution

The fourth proportional to 326,626.38, 489,748.90 and 126,713.18 is: 189,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,626.38 : 489,748.90 = 126,713.18 : x
  2. Step 2: Convert to fraction form
    326,626.38/489,748.90 = 126,713.18/x
  3. Step 3: Cross multiply
    326,626.38x = 489,748.90 × 126,713.18
  4. Step 4: Simplify right side
    326,626.38x = 62,057,640,520.50
  5. Step 5: Solve for x
    x = 62,057,640,520.50/326,626.38
  6. Step 6: Final answer
    x = 189,995.80

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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.