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Finding the Fourth Proportional to 308,638.86, 425,919.48 and 172,672.26

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Solution

The fourth proportional to 308,638.86, 425,919.48 and 172,672.26 is: 238,286.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,638.86 : 425,919.48 = 172,672.26 : x
  2. Step 2: Convert to fraction form
    308,638.86/425,919.48 = 172,672.26/x
  3. Step 3: Cross multiply
    308,638.86x = 425,919.48 × 172,672.26
  4. Step 4: Simplify right side
    308,638.86x = 73,544,479,189.62
  5. Step 5: Solve for x
    x = 73,544,479,189.62/308,638.86
  6. Step 6: Final answer
    x = 238,286.52

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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.