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Finding the Fourth Proportional to 308,195.13, 425,309.86 and 172,229.08

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Solution

The fourth proportional to 308,195.13, 425,309.86 and 172,229.08 is: 237,676.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,195.13 : 425,309.86 = 172,229.08 : x
  2. Step 2: Convert to fraction form
    308,195.13/425,309.86 = 172,229.08/x
  3. Step 3: Cross multiply
    308,195.13x = 425,309.86 × 172,229.08
  4. Step 4: Simplify right side
    308,195.13x = 73,250,726,003.79
  5. Step 5: Solve for x
    x = 73,250,726,003.79/308,195.13
  6. Step 6: Final answer
    x = 237,676.45

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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.