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Finding the Fourth Proportional to 662.24, 992.88 and 320.48

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Solution

The fourth proportional to 662.24, 992.88 and 320.48 is: 480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.24 : 992.88 = 320.48 : x
  2. Step 2: Convert to fraction form
    662.24/992.88 = 320.48/x
  3. Step 3: Cross multiply
    662.24x = 992.88 × 320.48
  4. Step 4: Simplify right side
    662.24x = 318,198.18
  5. Step 5: Solve for x
    x = 318,198.18/662.24
  6. Step 6: Final answer
    x = 480.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.