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Finding the Fourth Proportional to 308,765.47, 426,115.11 and 172,796.59

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Solution

The fourth proportional to 308,765.47, 426,115.11 and 172,796.59 is: 238,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,765.47 : 426,115.11 = 172,796.59 : x
  2. Step 2: Convert to fraction form
    308,765.47/426,115.11 = 172,796.59/x
  3. Step 3: Cross multiply
    308,765.47x = 426,115.11 × 172,796.59
  4. Step 4: Simplify right side
    308,765.47x = 73,631,239,136.11
  5. Step 5: Solve for x
    x = 73,631,239,136.11/308,765.47
  6. Step 6: Final answer
    x = 238,469.80

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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.