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Finding the Fourth Proportional to 159.36, 221.46 and 157.32

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Solution

The fourth proportional to 159.36, 221.46 and 157.32 is: 218.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.36 : 221.46 = 157.32 : x
  2. Step 2: Convert to fraction form
    159.36/221.46 = 157.32/x
  3. Step 3: Cross multiply
    159.36x = 221.46 × 157.32
  4. Step 4: Simplify right side
    159.36x = 34,840.09
  5. Step 5: Solve for x
    x = 34,840.09/159.36
  6. Step 6: Final answer
    x = 218.63

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.