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Finding the Fourth Proportional to 259,755.28, 389,319.40 and 126,435.76

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Solution

The fourth proportional to 259,755.28, 389,319.40 and 126,435.76 is: 189,501.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,755.28 : 389,319.40 = 126,435.76 : x
  2. Step 2: Convert to fraction form
    259,755.28/389,319.40 = 126,435.76/x
  3. Step 3: Cross multiply
    259,755.28x = 389,319.40 × 126,435.76
  4. Step 4: Simplify right side
    259,755.28x = 49,223,894,221.74
  5. Step 5: Solve for x
    x = 49,223,894,221.74/259,755.28
  6. Step 6: Final answer
    x = 189,501.03

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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.