Home / 1,279,921.80-1,919,364.30-438,040.20

Finding the Fourth Proportional to 1,279,921.80, 1,919,364.30 and 438,040.20

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Solution

The fourth proportional to 1,279,921.80, 1,919,364.30 and 438,040.20 is: 656,882.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,921.80 : 1,919,364.30 = 438,040.20 : x
  2. Step 2: Convert to fraction form
    1,279,921.80/1,919,364.30 = 438,040.20/x
  3. Step 3: Cross multiply
    1,279,921.80x = 1,919,364.30 × 438,040.20
  4. Step 4: Simplify right side
    1,279,921.80x = 840,758,721,844.86
  5. Step 5: Solve for x
    x = 840,758,721,844.86/1,279,921.80
  6. Step 6: Final answer
    x = 656,882.88

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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.