Home / 1,378,234.20-2,067,578.10-431,376.60

Finding the Fourth Proportional to 1,378,234.20, 2,067,578.10 and 431,376.60

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Solution

The fourth proportional to 1,378,234.20, 2,067,578.10 and 431,376.60 is: 647,135.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,234.20 : 2,067,578.10 = 431,376.60 : x
  2. Step 2: Convert to fraction form
    1,378,234.20/2,067,578.10 = 431,376.60/x
  3. Step 3: Cross multiply
    1,378,234.20x = 2,067,578.10 × 431,376.60
  4. Step 4: Simplify right side
    1,378,234.20x = 891,904,811,012.46
  5. Step 5: Solve for x
    x = 891,904,811,012.46/1,378,234.20
  6. Step 6: Final answer
    x = 647,135.89

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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.