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Finding the Fourth Proportional to 480.80, 663.60 and 284.30

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Solution

The fourth proportional to 480.80, 663.60 and 284.30 is: 392.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.80 : 663.60 = 284.30 : x
  2. Step 2: Convert to fraction form
    480.80/663.60 = 284.30/x
  3. Step 3: Cross multiply
    480.80x = 663.60 × 284.30
  4. Step 4: Simplify right side
    480.80x = 188,661.48
  5. Step 5: Solve for x
    x = 188,661.48/480.80
  6. Step 6: Final answer
    x = 392.39

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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.