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Finding the Fourth Proportional to 309.96, 427.86 and 227.43

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Solution

The fourth proportional to 309.96, 427.86 and 227.43 is: 313.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.96 : 427.86 = 227.43 : x
  2. Step 2: Convert to fraction form
    309.96/427.86 = 227.43/x
  3. Step 3: Cross multiply
    309.96x = 427.86 × 227.43
  4. Step 4: Simplify right side
    309.96x = 97,308.20
  5. Step 5: Solve for x
    x = 97,308.20/309.96
  6. Step 6: Final answer
    x = 313.94

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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.