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Finding the Fourth Proportional to 281.53, 421.94 and 243.01

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Solution

The fourth proportional to 281.53, 421.94 and 243.01 is: 364.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.53 : 421.94 = 243.01 : x
  2. Step 2: Convert to fraction form
    281.53/421.94 = 243.01/x
  3. Step 3: Cross multiply
    281.53x = 421.94 × 243.01
  4. Step 4: Simplify right side
    281.53x = 102,534.42
  5. Step 5: Solve for x
    x = 102,534.42/281.53
  6. Step 6: Final answer
    x = 364.20

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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.