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Finding the Fourth Proportional to 259,745.28, 389,304.40 and 126,425.76

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Solution

The fourth proportional to 259,745.28, 389,304.40 and 126,425.76 is: 189,486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,745.28 : 389,304.40 = 126,425.76 : x
  2. Step 2: Convert to fraction form
    259,745.28/389,304.40 = 126,425.76/x
  3. Step 3: Cross multiply
    259,745.28x = 389,304.40 × 126,425.76
  4. Step 4: Simplify right side
    259,745.28x = 49,218,104,641.34
  5. Step 5: Solve for x
    x = 49,218,104,641.34/259,745.28
  6. Step 6: Final answer
    x = 189,486.04

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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.