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Finding the Fourth Proportional to 231.68, 348.90 and 206.36

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Solution

The fourth proportional to 231.68, 348.90 and 206.36 is: 310.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.68 : 348.90 = 206.36 : x
  2. Step 2: Convert to fraction form
    231.68/348.90 = 206.36/x
  3. Step 3: Cross multiply
    231.68x = 348.90 × 206.36
  4. Step 4: Simplify right side
    231.68x = 71,999.00
  5. Step 5: Solve for x
    x = 71,999.00/231.68
  6. Step 6: Final answer
    x = 310.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.