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Finding the Fourth Proportional to 313.82, 431.99 and 271.79

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Solution

The fourth proportional to 313.82, 431.99 and 271.79 is: 374.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.82 : 431.99 = 271.79 : x
  2. Step 2: Convert to fraction form
    313.82/431.99 = 271.79/x
  3. Step 3: Cross multiply
    313.82x = 431.99 × 271.79
  4. Step 4: Simplify right side
    313.82x = 117,410.56
  5. Step 5: Solve for x
    x = 117,410.56/313.82
  6. Step 6: Final answer
    x = 374.13

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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.