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Finding the Fourth Proportional to 326,239.20, 489,358.80 and 231,760.80

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Solution

The fourth proportional to 326,239.20, 489,358.80 and 231,760.80 is: 347,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,239.20 : 489,358.80 = 231,760.80 : x
  2. Step 2: Convert to fraction form
    326,239.20/489,358.80 = 231,760.80/x
  3. Step 3: Cross multiply
    326,239.20x = 489,358.80 × 231,760.80
  4. Step 4: Simplify right side
    326,239.20x = 113,414,186,975.04
  5. Step 5: Solve for x
    x = 113,414,186,975.04/326,239.20
  6. Step 6: Final answer
    x = 347,641.20

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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.