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Finding the Fourth Proportional to 480.64, 663.38 and 306.20

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Solution

The fourth proportional to 480.64, 663.38 and 306.20 is: 422.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.64 : 663.38 = 306.20 : x
  2. Step 2: Convert to fraction form
    480.64/663.38 = 306.20/x
  3. Step 3: Cross multiply
    480.64x = 663.38 × 306.20
  4. Step 4: Simplify right side
    480.64x = 203,126.96
  5. Step 5: Solve for x
    x = 203,126.96/480.64
  6. Step 6: Final answer
    x = 422.62

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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.