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Finding the Fourth Proportional to 312,959.22, 431,901.99 and 177,005.22

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Solution

The fourth proportional to 312,959.22, 431,901.99 and 177,005.22 is: 244,277.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,959.22 : 431,901.99 = 177,005.22 : x
  2. Step 2: Convert to fraction form
    312,959.22/431,901.99 = 177,005.22/x
  3. Step 3: Cross multiply
    312,959.22x = 431,901.99 × 177,005.22
  4. Step 4: Simplify right side
    312,959.22x = 76,448,906,758.39
  5. Step 5: Solve for x
    x = 76,448,906,758.39/312,959.22
  6. Step 6: Final answer
    x = 244,277.53

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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.