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Finding the Fourth Proportional to 308,523.88, 425,761.72 and 172,557.28

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Solution

The fourth proportional to 308,523.88, 425,761.72 and 172,557.28 is: 238,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,523.88 : 425,761.72 = 172,557.28 : x
  2. Step 2: Convert to fraction form
    308,523.88/425,761.72 = 172,557.28/x
  3. Step 3: Cross multiply
    308,523.88x = 425,761.72 × 172,557.28
  4. Step 4: Simplify right side
    308,523.88x = 73,468,284,331.32
  5. Step 5: Solve for x
    x = 73,468,284,331.32/308,523.88
  6. Step 6: Final answer
    x = 238,128.36

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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.