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Finding the Fourth Proportional to 308,661.75, 425,969.76 and 172,687.59

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Solution

The fourth proportional to 308,661.75, 425,969.76 and 172,687.59 is: 238,318.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,661.75 : 425,969.76 = 172,687.59 : x
  2. Step 2: Convert to fraction form
    308,661.75/425,969.76 = 172,687.59/x
  3. Step 3: Cross multiply
    308,661.75x = 425,969.76 × 172,687.59
  4. Step 4: Simplify right side
    308,661.75x = 73,559,691,267.28
  5. Step 5: Solve for x
    x = 73,559,691,267.28/308,661.75
  6. Step 6: Final answer
    x = 238,318.13

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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.