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Finding the Fourth Proportional to 231, 346.55 and 102.75

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Solution

The fourth proportional to 231, 346.55 and 102.75 is: 154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    231 : 346.55 = 102.75 : x
  2. Step 2: Convert to fraction form
    231/346.55 = 102.75/x
  3. Step 3: Cross multiply
    231x = 346.55 × 102.75
  4. Step 4: Simplify right side
    231x = 35,607.50
  5. Step 5: Solve for x
    x = 35,607.50/231
  6. Step 6: Final answer
    x = 154.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.