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Finding the Fourth Proportional to 231.82, 347.74 and 87.46

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Solution

The fourth proportional to 231.82, 347.74 and 87.46 is: 131.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.82 : 347.74 = 87.46 : x
  2. Step 2: Convert to fraction form
    231.82/347.74 = 87.46/x
  3. Step 3: Cross multiply
    231.82x = 347.74 × 87.46
  4. Step 4: Simplify right side
    231.82x = 30,413.34
  5. Step 5: Solve for x
    x = 30,413.34/231.82
  6. Step 6: Final answer
    x = 131.19

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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.