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Finding the Fourth Proportional to 217.38, 299.94 and 210

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Solution

The fourth proportional to 217.38, 299.94 and 210 is: 289.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.38 : 299.94 = 210 : x
  2. Step 2: Convert to fraction form
    217.38/299.94 = 210/x
  3. Step 3: Cross multiply
    217.38x = 299.94 × 210
  4. Step 4: Simplify right side
    217.38x = 62,987.40
  5. Step 5: Solve for x
    x = 62,987.40/217.38
  6. Step 6: Final answer
    x = 289.76

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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.