Home / 1,278,428.22-1,917,143.82-479,273.58

Finding the Fourth Proportional to 1,278,428.22, 1,917,143.82 and 479,273.58

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Solution

The fourth proportional to 1,278,428.22, 1,917,143.82 and 479,273.58 is: 718,723.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,428.22 : 1,917,143.82 = 479,273.58 : x
  2. Step 2: Convert to fraction form
    1,278,428.22/1,917,143.82 = 479,273.58/x
  3. Step 3: Cross multiply
    1,278,428.22x = 1,917,143.82 × 479,273.58
  4. Step 4: Simplify right side
    1,278,428.22x = 918,836,381,986.28
  5. Step 5: Solve for x
    x = 918,836,381,986.28/1,278,428.22
  6. Step 6: Final answer
    x = 718,723.48

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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.