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Finding the Fourth Proportional to 481.13, 663.63 and 356.90

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Solution

The fourth proportional to 481.13, 663.63 and 356.90 is: 492.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.13 : 663.63 = 356.90 : x
  2. Step 2: Convert to fraction form
    481.13/663.63 = 356.90/x
  3. Step 3: Cross multiply
    481.13x = 663.63 × 356.90
  4. Step 4: Simplify right side
    481.13x = 236,846.23
  5. Step 5: Solve for x
    x = 236,846.23/481.13
  6. Step 6: Final answer
    x = 492.28

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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.