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Finding the Fourth Proportional to 217.13, 299.21 and 158.02

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Solution

The fourth proportional to 217.13, 299.21 and 158.02 is: 217.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.13 : 299.21 = 158.02 : x
  2. Step 2: Convert to fraction form
    217.13/299.21 = 158.02/x
  3. Step 3: Cross multiply
    217.13x = 299.21 × 158.02
  4. Step 4: Simplify right side
    217.13x = 47,280.37
  5. Step 5: Solve for x
    x = 47,280.37/217.13
  6. Step 6: Final answer
    x = 217.75

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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.