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Finding the Fourth Proportional to 308,637.37, 425,936.11 and 172,663.20

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Solution

The fourth proportional to 308,637.37, 425,936.11 and 172,663.20 is: 238,284.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,637.37 : 425,936.11 = 172,663.20 : x
  2. Step 2: Convert to fraction form
    308,637.37/425,936.11 = 172,663.20/x
  3. Step 3: Cross multiply
    308,637.37x = 425,936.11 × 172,663.20
  4. Step 4: Simplify right side
    308,637.37x = 73,543,491,748.15
  5. Step 5: Solve for x
    x = 73,543,491,748.15/308,637.37
  6. Step 6: Final answer
    x = 238,284.47

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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.