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Finding the Fourth Proportional to 322.46, 445.02 and 243.64

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Solution

The fourth proportional to 322.46, 445.02 and 243.64 is: 336.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.46 : 445.02 = 243.64 : x
  2. Step 2: Convert to fraction form
    322.46/445.02 = 243.64/x
  3. Step 3: Cross multiply
    322.46x = 445.02 × 243.64
  4. Step 4: Simplify right side
    322.46x = 108,424.67
  5. Step 5: Solve for x
    x = 108,424.67/322.46
  6. Step 6: Final answer
    x = 336.24

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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.