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Finding the Fourth Proportional to 481.16, 720.46 and 388.10

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Solution

The fourth proportional to 481.16, 720.46 and 388.10 is: 581.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.16 : 720.46 = 388.10 : x
  2. Step 2: Convert to fraction form
    481.16/720.46 = 388.10/x
  3. Step 3: Cross multiply
    481.16x = 720.46 × 388.10
  4. Step 4: Simplify right side
    481.16x = 279,610.53
  5. Step 5: Solve for x
    x = 279,610.53/481.16
  6. Step 6: Final answer
    x = 581.12

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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.