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Finding the Fourth Proportional to 308,846.53, 426,188.46 and 172,857.61

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Solution

The fourth proportional to 308,846.53, 426,188.46 and 172,857.61 is: 238,532.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,846.53 : 426,188.46 = 172,857.61 : x
  2. Step 2: Convert to fraction form
    308,846.53/426,188.46 = 172,857.61/x
  3. Step 3: Cross multiply
    308,846.53x = 426,188.46 × 172,857.61
  4. Step 4: Simplify right side
    308,846.53x = 73,669,918,605.18
  5. Step 5: Solve for x
    x = 73,669,918,605.18/308,846.53
  6. Step 6: Final answer
    x = 238,532.45

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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.