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Finding the Fourth Proportional to 259,982.80, 389,974.20 and 126,948.40

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Solution

The fourth proportional to 259,982.80, 389,974.20 and 126,948.40 is: 190,422.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,982.80 : 389,974.20 = 126,948.40 : x
  2. Step 2: Convert to fraction form
    259,982.80/389,974.20 = 126,948.40/x
  3. Step 3: Cross multiply
    259,982.80x = 389,974.20 × 126,948.40
  4. Step 4: Simplify right side
    259,982.80x = 49,506,600,731.28
  5. Step 5: Solve for x
    x = 49,506,600,731.28/259,982.80
  6. Step 6: Final answer
    x = 190,422.60

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Similar ratio
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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.