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Finding the Fourth Proportional to 281.35, 421.20 and 200.35

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Solution

The fourth proportional to 281.35, 421.20 and 200.35 is: 299.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.35 : 421.20 = 200.35 : x
  2. Step 2: Convert to fraction form
    281.35/421.20 = 200.35/x
  3. Step 3: Cross multiply
    281.35x = 421.20 × 200.35
  4. Step 4: Simplify right side
    281.35x = 84,387.42
  5. Step 5: Solve for x
    x = 84,387.42/281.35
  6. Step 6: Final answer
    x = 299.94

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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.