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Finding the Fourth Proportional to 308,553.74, 425,761.62 and 172,580.66

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Solution

The fourth proportional to 308,553.74, 425,761.62 and 172,580.66 is: 238,137.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,553.74 : 425,761.62 = 172,580.66 : x
  2. Step 2: Convert to fraction form
    308,553.74/425,761.62 = 172,580.66/x
  3. Step 3: Cross multiply
    308,553.74x = 425,761.62 × 172,580.66
  4. Step 4: Simplify right side
    308,553.74x = 73,478,221,382.27
  5. Step 5: Solve for x
    x = 73,478,221,382.27/308,553.74
  6. Step 6: Final answer
    x = 238,137.52

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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.