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Finding the Fourth Proportional to 409.82, 565.17 and 316.43

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Solution

The fourth proportional to 409.82, 565.17 and 316.43 is: 436.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.82 : 565.17 = 316.43 : x
  2. Step 2: Convert to fraction form
    409.82/565.17 = 316.43/x
  3. Step 3: Cross multiply
    409.82x = 565.17 × 316.43
  4. Step 4: Simplify right side
    409.82x = 178,833.92
  5. Step 5: Solve for x
    x = 178,833.92/409.82
  6. Step 6: Final answer
    x = 436.37

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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.