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Finding the Fourth Proportional to 480.28, 662.79 and 283.80

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Solution

The fourth proportional to 480.28, 662.79 and 283.80 is: 391.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.28 : 662.79 = 283.80 : x
  2. Step 2: Convert to fraction form
    480.28/662.79 = 283.80/x
  3. Step 3: Cross multiply
    480.28x = 662.79 × 283.80
  4. Step 4: Simplify right side
    480.28x = 188,099.80
  5. Step 5: Solve for x
    x = 188,099.80/480.28
  6. Step 6: Final answer
    x = 391.65

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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.