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Finding the Fourth Proportional to 217.40, 299.88 and 134.36

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Solution

The fourth proportional to 217.40, 299.88 and 134.36 is: 185.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.40 : 299.88 = 134.36 : x
  2. Step 2: Convert to fraction form
    217.40/299.88 = 134.36/x
  3. Step 3: Cross multiply
    217.40x = 299.88 × 134.36
  4. Step 4: Simplify right side
    217.40x = 40,291.88
  5. Step 5: Solve for x
    x = 40,291.88/217.40
  6. Step 6: Final answer
    x = 185.34

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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.