Home / 1,278,412.38-1,917,120.20-479,257.88

Finding the Fourth Proportional to 1,278,412.38, 1,917,120.20 and 479,257.88

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Solution

The fourth proportional to 1,278,412.38, 1,917,120.20 and 479,257.88 is: 718,699.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,412.38 : 1,917,120.20 = 479,257.88 : x
  2. Step 2: Convert to fraction form
    1,278,412.38/1,917,120.20 = 479,257.88/x
  3. Step 3: Cross multiply
    1,278,412.38x = 1,917,120.20 × 479,257.88
  4. Step 4: Simplify right side
    1,278,412.38x = 918,794,950,775.29
  5. Step 5: Solve for x
    x = 918,794,950,775.29/1,278,412.38
  6. Step 6: Final answer
    x = 718,699.98

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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.