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Finding the Fourth Proportional to 494.25, 740.85 and 220.53

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Solution

The fourth proportional to 494.25, 740.85 and 220.53 is: 330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.25 : 740.85 = 220.53 : x
  2. Step 2: Convert to fraction form
    494.25/740.85 = 220.53/x
  3. Step 3: Cross multiply
    494.25x = 740.85 × 220.53
  4. Step 4: Simplify right side
    494.25x = 163,379.65
  5. Step 5: Solve for x
    x = 163,379.65/494.25
  6. Step 6: Final answer
    x = 330.56

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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.