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Finding the Fourth Proportional to 965,920.80, 1,449,140.40 and 861,463.20

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Solution

The fourth proportional to 965,920.80, 1,449,140.40 and 861,463.20 is: 1,292,425.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    965,920.80 : 1,449,140.40 = 861,463.20 : x
  2. Step 2: Convert to fraction form
    965,920.80/1,449,140.40 = 861,463.20/x
  3. Step 3: Cross multiply
    965,920.80x = 1,449,140.40 × 861,463.20
  4. Step 4: Simplify right side
    965,920.80x = 1,248,381,126,233.28
  5. Step 5: Solve for x
    x = 1,248,381,126,233.28/965,920.80
  6. Step 6: Final answer
    x = 1,292,425.97

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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.