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Finding the Fourth Proportional to 308,881.53, 426,236.76 and 172,892.61

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Solution

The fourth proportional to 308,881.53, 426,236.76 and 172,892.61 is: 238,580.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,881.53 : 426,236.76 = 172,892.61 : x
  2. Step 2: Convert to fraction form
    308,881.53/426,236.76 = 172,892.61/x
  3. Step 3: Cross multiply
    308,881.53x = 426,236.76 × 172,892.61
  4. Step 4: Simplify right side
    308,881.53x = 73,693,185,914.34
  5. Step 5: Solve for x
    x = 73,693,185,914.34/308,881.53
  6. Step 6: Final answer
    x = 238,580.75

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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.