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Finding the Fourth Proportional to 322.80, 445.45 and 175.43

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Solution

The fourth proportional to 322.80, 445.45 and 175.43 is: 242.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.80 : 445.45 = 175.43 : x
  2. Step 2: Convert to fraction form
    322.80/445.45 = 175.43/x
  3. Step 3: Cross multiply
    322.80x = 445.45 × 175.43
  4. Step 4: Simplify right side
    322.80x = 78,145.29
  5. Step 5: Solve for x
    x = 78,145.29/322.80
  6. Step 6: Final answer
    x = 242.09

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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.