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Finding the Fourth Proportional to 308,822.70, 426,155.54 and 172,833.69

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Solution

The fourth proportional to 308,822.70, 426,155.54 and 172,833.69 is: 238,499.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,822.70 : 426,155.54 = 172,833.69 : x
  2. Step 2: Convert to fraction form
    308,822.70/426,155.54 = 172,833.69/x
  3. Step 3: Cross multiply
    308,822.70x = 426,155.54 × 172,833.69
  4. Step 4: Simplify right side
    308,822.70x = 73,654,033,627.97
  5. Step 5: Solve for x
    x = 73,654,033,627.97/308,822.70
  6. Step 6: Final answer
    x = 238,499.42

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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.