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Finding the Fourth Proportional to 800,855.22, 1,105,180.05 and 438,279.30

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Solution

The fourth proportional to 800,855.22, 1,105,180.05 and 438,279.30 is: 604,825.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,855.22 : 1,105,180.05 = 438,279.30 : x
  2. Step 2: Convert to fraction form
    800,855.22/1,105,180.05 = 438,279.30/x
  3. Step 3: Cross multiply
    800,855.22x = 1,105,180.05 × 438,279.30
  4. Step 4: Simplify right side
    800,855.22x = 484,377,538,687.97
  5. Step 5: Solve for x
    x = 484,377,538,687.97/800,855.22
  6. Step 6: Final answer
    x = 604,825.35

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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.