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Finding the Fourth Proportional to 281.67, 421.89 and 273.16

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Solution

The fourth proportional to 281.67, 421.89 and 273.16 is: 409.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.67 : 421.89 = 273.16 : x
  2. Step 2: Convert to fraction form
    281.67/421.89 = 273.16/x
  3. Step 3: Cross multiply
    281.67x = 421.89 × 273.16
  4. Step 4: Simplify right side
    281.67x = 115,243.47
  5. Step 5: Solve for x
    x = 115,243.47/281.67
  6. Step 6: Final answer
    x = 409.14

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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.