Home / 1,131,780.80-1,561,333.92-678,284.48

Finding the Fourth Proportional to 1,131,780.80, 1,561,333.92 and 678,284.48

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Solution

The fourth proportional to 1,131,780.80, 1,561,333.92 and 678,284.48 is: 935,718.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131,780.80 : 1,561,333.92 = 678,284.48 : x
  2. Step 2: Convert to fraction form
    1,131,780.80/1,561,333.92 = 678,284.48/x
  3. Step 3: Cross multiply
    1,131,780.80x = 1,561,333.92 × 678,284.48
  4. Step 4: Simplify right side
    1,131,780.80x = 1,059,028,566,033.56
  5. Step 5: Solve for x
    x = 1,059,028,566,033.56/1,131,780.80
  6. Step 6: Final answer
    x = 935,718.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.