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Finding the Fourth Proportional to 216.28, 298.38 and 158.08

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Solution

The fourth proportional to 216.28, 298.38 and 158.08 is: 218.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.28 : 298.38 = 158.08 : x
  2. Step 2: Convert to fraction form
    216.28/298.38 = 158.08/x
  3. Step 3: Cross multiply
    216.28x = 298.38 × 158.08
  4. Step 4: Simplify right side
    216.28x = 47,167.91
  5. Step 5: Solve for x
    x = 47,167.91/216.28
  6. Step 6: Final answer
    x = 218.09

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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.