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Finding the Fourth Proportional to 322.24, 480.52 and 321.64

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Solution

The fourth proportional to 322.24, 480.52 and 321.64 is: 479.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.24 : 480.52 = 321.64 : x
  2. Step 2: Convert to fraction form
    322.24/480.52 = 321.64/x
  3. Step 3: Cross multiply
    322.24x = 480.52 × 321.64
  4. Step 4: Simplify right side
    322.24x = 154,554.45
  5. Step 5: Solve for x
    x = 154,554.45/322.24
  6. Step 6: Final answer
    x = 479.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.