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Finding the Fourth Proportional to 213.26, 294.37 and 155.21

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Solution

The fourth proportional to 213.26, 294.37 and 155.21 is: 214.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.26 : 294.37 = 155.21 : x
  2. Step 2: Convert to fraction form
    213.26/294.37 = 155.21/x
  3. Step 3: Cross multiply
    213.26x = 294.37 × 155.21
  4. Step 4: Simplify right side
    213.26x = 45,687.31
  5. Step 5: Solve for x
    x = 45,687.31/213.26
  6. Step 6: Final answer
    x = 214.24

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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.