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Finding the Fourth Proportional to 326,022.40, 489,009.30 and 136,433.80

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Solution

The fourth proportional to 326,022.40, 489,009.30 and 136,433.80 is: 204,640.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,022.40 : 489,009.30 = 136,433.80 : x
  2. Step 2: Convert to fraction form
    326,022.40/489,009.30 = 136,433.80/x
  3. Step 3: Cross multiply
    326,022.40x = 489,009.30 × 136,433.80
  4. Step 4: Simplify right side
    326,022.40x = 66,717,397,034.34
  5. Step 5: Solve for x
    x = 66,717,397,034.34/326,022.40
  6. Step 6: Final answer
    x = 204,640.53

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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.