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Finding the Fourth Proportional to 752,128, 1,128,270.96 and 219,650.48

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Solution

The fourth proportional to 752,128, 1,128,270.96 and 219,650.48 is: 329,498.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    752,128 : 1,128,270.96 = 219,650.48 : x
  2. Step 2: Convert to fraction form
    752,128/1,128,270.96 = 219,650.48/x
  3. Step 3: Cross multiply
    752,128x = 1,128,270.96 × 219,650.48
  4. Step 4: Simplify right side
    752,128x = 247,825,257,934.06
  5. Step 5: Solve for x
    x = 247,825,257,934.06/752,128
  6. Step 6: Final answer
    x = 329,498.78

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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.