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Finding the Fourth Proportional to 231.82, 347.74 and 135.56

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Solution

The fourth proportional to 231.82, 347.74 and 135.56 is: 203.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.82 : 347.74 = 135.56 : x
  2. Step 2: Convert to fraction form
    231.82/347.74 = 135.56/x
  3. Step 3: Cross multiply
    231.82x = 347.74 × 135.56
  4. Step 4: Simplify right side
    231.82x = 47,140.16
  5. Step 5: Solve for x
    x = 47,140.16/231.82
  6. Step 6: Final answer
    x = 203.35

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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.