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Finding the Fourth Proportional to 281.73, 420.56 and 243.46

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Solution

The fourth proportional to 281.73, 420.56 and 243.46 is: 363.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.73 : 420.56 = 243.46 : x
  2. Step 2: Convert to fraction form
    281.73/420.56 = 243.46/x
  3. Step 3: Cross multiply
    281.73x = 420.56 × 243.46
  4. Step 4: Simplify right side
    281.73x = 102,387.27
  5. Step 5: Solve for x
    x = 102,387.27/281.73
  6. Step 6: Final answer
    x = 363.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.