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Finding the Fourth Proportional to 494.20, 741.53 and 220.48

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Solution

The fourth proportional to 494.20, 741.53 and 220.48 is: 330.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.20 : 741.53 = 220.48 : x
  2. Step 2: Convert to fraction form
    494.20/741.53 = 220.48/x
  3. Step 3: Cross multiply
    494.20x = 741.53 × 220.48
  4. Step 4: Simplify right side
    494.20x = 163,491.23
  5. Step 5: Solve for x
    x = 163,491.23/494.20
  6. Step 6: Final answer
    x = 330.82

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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.