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Finding the Fourth Proportional to 266,427, 399,837.78 and 126,186.06

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Solution

The fourth proportional to 266,427, 399,837.78 and 126,186.06 is: 189,372.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,427 : 399,837.78 = 126,186.06 : x
  2. Step 2: Convert to fraction form
    266,427/399,837.78 = 126,186.06/x
  3. Step 3: Cross multiply
    266,427x = 399,837.78 × 126,186.06
  4. Step 4: Simplify right side
    266,427x = 50,453,954,097.35
  5. Step 5: Solve for x
    x = 50,453,954,097.35/266,427
  6. Step 6: Final answer
    x = 189,372.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.