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Finding the Fourth Proportional to 327, 453.18 and 317.68

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Solution

The fourth proportional to 327, 453.18 and 317.68 is: 440.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    327 : 453.18 = 317.68 : x
  2. Step 2: Convert to fraction form
    327/453.18 = 317.68/x
  3. Step 3: Cross multiply
    327x = 453.18 × 317.68
  4. Step 4: Simplify right side
    327x = 143,966.22
  5. Step 5: Solve for x
    x = 143,966.22/327
  6. Step 6: Final answer
    x = 440.26

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.