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Finding the Fourth Proportional to 480.33, 720.34 and 187.81

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Solution

The fourth proportional to 480.33, 720.34 and 187.81 is: 281.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.33 : 720.34 = 187.81 : x
  2. Step 2: Convert to fraction form
    480.33/720.34 = 187.81/x
  3. Step 3: Cross multiply
    480.33x = 720.34 × 187.81
  4. Step 4: Simplify right side
    480.33x = 135,286.12
  5. Step 5: Solve for x
    x = 135,286.12/480.33
  6. Step 6: Final answer
    x = 281.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.