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Finding the Fourth Proportional to 421.93, 631.53 and 226.44

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Solution

The fourth proportional to 421.93, 631.53 and 226.44 is: 338.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.93 : 631.53 = 226.44 : x
  2. Step 2: Convert to fraction form
    421.93/631.53 = 226.44/x
  3. Step 3: Cross multiply
    421.93x = 631.53 × 226.44
  4. Step 4: Simplify right side
    421.93x = 143,003.65
  5. Step 5: Solve for x
    x = 143,003.65/421.93
  6. Step 6: Final answer
    x = 338.93

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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.