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Finding the Fourth Proportional to 308,257.72, 425,393.88 and 172,291.42

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Solution

The fourth proportional to 308,257.72, 425,393.88 and 172,291.42 is: 237,761.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,257.72 : 425,393.88 = 172,291.42 : x
  2. Step 2: Convert to fraction form
    308,257.72/425,393.88 = 172,291.42/x
  3. Step 3: Cross multiply
    308,257.72x = 425,393.88 × 172,291.42
  4. Step 4: Simplify right side
    308,257.72x = 73,291,715,530.16
  5. Step 5: Solve for x
    x = 73,291,715,530.16/308,257.72
  6. Step 6: Final answer
    x = 237,761.17

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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.