Home / 728,716.78-1,093,215.27-279,402.61

Finding the Fourth Proportional to 728,716.78, 1,093,215.27 and 279,402.61

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Solution

The fourth proportional to 728,716.78, 1,093,215.27 and 279,402.61 is: 419,157.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,716.78 : 1,093,215.27 = 279,402.61 : x
  2. Step 2: Convert to fraction form
    728,716.78/1,093,215.27 = 279,402.61/x
  3. Step 3: Cross multiply
    728,716.78x = 1,093,215.27 × 279,402.61
  4. Step 4: Simplify right side
    728,716.78x = 305,447,199,729.86
  5. Step 5: Solve for x
    x = 305,447,199,729.86/728,716.78
  6. Step 6: Final answer
    x = 419,157.63

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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.