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Finding the Fourth Proportional to 311.34, 429.57 and 200.68

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Solution

The fourth proportional to 311.34, 429.57 and 200.68 is: 276.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.34 : 429.57 = 200.68 : x
  2. Step 2: Convert to fraction form
    311.34/429.57 = 200.68/x
  3. Step 3: Cross multiply
    311.34x = 429.57 × 200.68
  4. Step 4: Simplify right side
    311.34x = 86,206.11
  5. Step 5: Solve for x
    x = 86,206.11/311.34
  6. Step 6: Final answer
    x = 276.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.