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Finding the Fourth Proportional to 480.40, 663.41 and 382.87

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Solution

The fourth proportional to 480.40, 663.41 and 382.87 is: 528.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.40 : 663.41 = 382.87 : x
  2. Step 2: Convert to fraction form
    480.40/663.41 = 382.87/x
  3. Step 3: Cross multiply
    480.40x = 663.41 × 382.87
  4. Step 4: Simplify right side
    480.40x = 253,999.79
  5. Step 5: Solve for x
    x = 253,999.79/480.40
  6. Step 6: Final answer
    x = 528.73

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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.