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Finding the Fourth Proportional to 965,600.80, 1,448,660.40 and 861,143.20

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Solution

The fourth proportional to 965,600.80, 1,448,660.40 and 861,143.20 is: 1,291,945.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    965,600.80 : 1,448,660.40 = 861,143.20 : x
  2. Step 2: Convert to fraction form
    965,600.80/1,448,660.40 = 861,143.20/x
  3. Step 3: Cross multiply
    965,600.80x = 1,448,660.40 × 861,143.20
  4. Step 4: Simplify right side
    965,600.80x = 1,247,504,052,569.28
  5. Step 5: Solve for x
    x = 1,247,504,052,569.28/965,600.80
  6. Step 6: Final answer
    x = 1,291,945.96

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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.