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Finding the Fourth Proportional to 231.60, 347.94 and 191.10

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Solution

The fourth proportional to 231.60, 347.94 and 191.10 is: 287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.60 : 347.94 = 191.10 : x
  2. Step 2: Convert to fraction form
    231.60/347.94 = 191.10/x
  3. Step 3: Cross multiply
    231.60x = 347.94 × 191.10
  4. Step 4: Simplify right side
    231.60x = 66,491.33
  5. Step 5: Solve for x
    x = 66,491.33/231.60
  6. Step 6: Final answer
    x = 287.10

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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.