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Finding the Fourth Proportional to 308,896.62, 426,285.48 and 172,929.96

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Solution

The fourth proportional to 308,896.62, 426,285.48 and 172,929.96 is: 238,647.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,896.62 : 426,285.48 = 172,929.96 : x
  2. Step 2: Convert to fraction form
    308,896.62/426,285.48 = 172,929.96/x
  3. Step 3: Cross multiply
    308,896.62x = 426,285.48 × 172,929.96
  4. Step 4: Simplify right side
    308,896.62x = 73,717,531,004.98
  5. Step 5: Solve for x
    x = 73,717,531,004.98/308,896.62
  6. Step 6: Final answer
    x = 238,647.90

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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.