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Finding the Fourth Proportional to 308,580.81, 425,876.82 and 172,649.19

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Solution

The fourth proportional to 308,580.81, 425,876.82 and 172,649.19 is: 238,275.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,580.81 : 425,876.82 = 172,649.19 : x
  2. Step 2: Convert to fraction form
    308,580.81/425,876.82 = 172,649.19/x
  3. Step 3: Cross multiply
    308,580.81x = 425,876.82 × 172,649.19
  4. Step 4: Simplify right side
    308,580.81x = 73,527,288,012.78
  5. Step 5: Solve for x
    x = 73,527,288,012.78/308,580.81
  6. Step 6: Final answer
    x = 238,275.63

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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.