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Finding the Fourth Proportional to 481.12, 720.72 and 283.30

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Solution

The fourth proportional to 481.12, 720.72 and 283.30 is: 424.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.12 : 720.72 = 283.30 : x
  2. Step 2: Convert to fraction form
    481.12/720.72 = 283.30/x
  3. Step 3: Cross multiply
    481.12x = 720.72 × 283.30
  4. Step 4: Simplify right side
    481.12x = 204,179.98
  5. Step 5: Solve for x
    x = 204,179.98/481.12
  6. Step 6: Final answer
    x = 424.38

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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.