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Finding the Fourth Proportional to 308,912.06, 426,249.24 and 172,951.70

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Solution

The fourth proportional to 308,912.06, 426,249.24 and 172,951.70 is: 238,645.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,912.06 : 426,249.24 = 172,951.70 : x
  2. Step 2: Convert to fraction form
    308,912.06/426,249.24 = 172,951.70/x
  3. Step 3: Cross multiply
    308,912.06x = 426,249.24 × 172,951.70
  4. Step 4: Simplify right side
    308,912.06x = 73,720,530,681.71
  5. Step 5: Solve for x
    x = 73,720,530,681.71/308,912.06
  6. Step 6: Final answer
    x = 238,645.69

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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.