Home / 312,481.28-431,255.04-178,365.44

Finding the Fourth Proportional to 312,481.28, 431,255.04 and 178,365.44

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Solution

The fourth proportional to 312,481.28, 431,255.04 and 178,365.44 is: 246,161.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,481.28 : 431,255.04 = 178,365.44 : x
  2. Step 2: Convert to fraction form
    312,481.28/431,255.04 = 178,365.44/x
  3. Step 3: Cross multiply
    312,481.28x = 431,255.04 × 178,365.44
  4. Step 4: Simplify right side
    312,481.28x = 76,920,994,961.82
  5. Step 5: Solve for x
    x = 76,920,994,961.82/312,481.28
  6. Step 6: Final answer
    x = 246,161.93

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1.5x scale

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.