Home / 478,105.97-659,788.20-287,122.55

Finding the Fourth Proportional to 478,105.97, 659,788.20 and 287,122.55

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Solution

The fourth proportional to 478,105.97, 659,788.20 and 287,122.55 is: 396,230.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,105.97 : 659,788.20 = 287,122.55 : x
  2. Step 2: Convert to fraction form
    478,105.97/659,788.20 = 287,122.55/x
  3. Step 3: Cross multiply
    478,105.97x = 659,788.20 × 287,122.55
  4. Step 4: Simplify right side
    478,105.97x = 189,440,067,144.97
  5. Step 5: Solve for x
    x = 189,440,067,144.97/478,105.97
  6. Step 6: Final answer
    x = 396,230.29

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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.