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Finding the Fourth Proportional to 308,760.44, 426,112.34 and 172,808.04

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Solution

The fourth proportional to 308,760.44, 426,112.34 and 172,808.04 is: 238,487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,760.44 : 426,112.34 = 172,808.04 : x
  2. Step 2: Convert to fraction form
    308,760.44/426,112.34 = 172,808.04/x
  3. Step 3: Cross multiply
    308,760.44x = 426,112.34 × 172,808.04
  4. Step 4: Simplify right side
    308,760.44x = 73,635,638,295.21
  5. Step 5: Solve for x
    x = 73,635,638,295.21/308,760.44
  6. Step 6: Final answer
    x = 238,487.93

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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.