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Finding the Fourth Proportional to 480.45, 663.11 and 281.30

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Solution

The fourth proportional to 480.45, 663.11 and 281.30 is: 388.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.45 : 663.11 = 281.30 : x
  2. Step 2: Convert to fraction form
    480.45/663.11 = 281.30/x
  3. Step 3: Cross multiply
    480.45x = 663.11 × 281.30
  4. Step 4: Simplify right side
    480.45x = 186,533.55
  5. Step 5: Solve for x
    x = 186,533.55/480.45
  6. Step 6: Final answer
    x = 388.25

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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.