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Finding the Fourth Proportional to 231.58, 319.71 and 160.81

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Solution

The fourth proportional to 231.58, 319.71 and 160.81 is: 222.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.58 : 319.71 = 160.81 : x
  2. Step 2: Convert to fraction form
    231.58/319.71 = 160.81/x
  3. Step 3: Cross multiply
    231.58x = 319.71 × 160.81
  4. Step 4: Simplify right side
    231.58x = 51,412.57
  5. Step 5: Solve for x
    x = 51,412.57/231.58
  6. Step 6: Final answer
    x = 222.01

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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.