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Finding the Fourth Proportional to 159.56, 218.89 and 155.29

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Solution

The fourth proportional to 159.56, 218.89 and 155.29 is: 213.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.56 : 218.89 = 155.29 : x
  2. Step 2: Convert to fraction form
    159.56/218.89 = 155.29/x
  3. Step 3: Cross multiply
    159.56x = 218.89 × 155.29
  4. Step 4: Simplify right side
    159.56x = 33,991.43
  5. Step 5: Solve for x
    x = 33,991.43/159.56
  6. Step 6: Final answer
    x = 213.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.