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Finding the Fourth Proportional to 308,197.98, 425,311.94 and 172,231.88

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Solution

The fourth proportional to 308,197.98, 425,311.94 and 172,231.88 is: 237,679.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,197.98 : 425,311.94 = 172,231.88 : x
  2. Step 2: Convert to fraction form
    308,197.98/425,311.94 = 172,231.88/x
  3. Step 3: Cross multiply
    308,197.98x = 425,311.94 × 172,231.88
  4. Step 4: Simplify right side
    308,197.98x = 73,252,275,012.65
  5. Step 5: Solve for x
    x = 73,252,275,012.65/308,197.98
  6. Step 6: Final answer
    x = 237,679.28

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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.