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Finding the Fourth Proportional to 265,997.28, 398,991.60 and 125,856.48

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Solution

The fourth proportional to 265,997.28, 398,991.60 and 125,856.48 is: 188,782.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,997.28 : 398,991.60 = 125,856.48 : x
  2. Step 2: Convert to fraction form
    265,997.28/398,991.60 = 125,856.48/x
  3. Step 3: Cross multiply
    265,997.28x = 398,991.60 × 125,856.48
  4. Step 4: Simplify right side
    265,997.28x = 50,215,678,325.57
  5. Step 5: Solve for x
    x = 50,215,678,325.57/265,997.28
  6. Step 6: Final answer
    x = 188,782.68

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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.