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Finding the Fourth Proportional to 231.02, 345.07 and 194.57

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Solution

The fourth proportional to 231.02, 345.07 and 194.57 is: 290.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.02 : 345.07 = 194.57 : x
  2. Step 2: Convert to fraction form
    231.02/345.07 = 194.57/x
  3. Step 3: Cross multiply
    231.02x = 345.07 × 194.57
  4. Step 4: Simplify right side
    231.02x = 67,138.06
  5. Step 5: Solve for x
    x = 67,138.06/231.02
  6. Step 6: Final answer
    x = 290.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.