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Finding the Fourth Proportional to 322.17, 445.28 and 248.46

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Solution

The fourth proportional to 322.17, 445.28 and 248.46 is: 343.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.17 : 445.28 = 248.46 : x
  2. Step 2: Convert to fraction form
    322.17/445.28 = 248.46/x
  3. Step 3: Cross multiply
    322.17x = 445.28 × 248.46
  4. Step 4: Simplify right side
    322.17x = 110,633.03
  5. Step 5: Solve for x
    x = 110,633.03/322.17
  6. Step 6: Final answer
    x = 343.40

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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.