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Finding the Fourth Proportional to 231.74, 319.73 and 148.85

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Solution

The fourth proportional to 231.74, 319.73 and 148.85 is: 205.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.74 : 319.73 = 148.85 : x
  2. Step 2: Convert to fraction form
    231.74/319.73 = 148.85/x
  3. Step 3: Cross multiply
    231.74x = 319.73 × 148.85
  4. Step 4: Simplify right side
    231.74x = 47,591.81
  5. Step 5: Solve for x
    x = 47,591.81/231.74
  6. Step 6: Final answer
    x = 205.37

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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.