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Finding the Fourth Proportional to 217.42, 299.95 and 130.12

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Solution

The fourth proportional to 217.42, 299.95 and 130.12 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.42 : 299.95 = 130.12 : x
  2. Step 2: Convert to fraction form
    217.42/299.95 = 130.12/x
  3. Step 3: Cross multiply
    217.42x = 299.95 × 130.12
  4. Step 4: Simplify right side
    217.42x = 39,029.49
  5. Step 5: Solve for x
    x = 39,029.49/217.42
  6. Step 6: Final answer
    x = 179.51

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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.