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Finding the Fourth Proportional to 207.92, 310.54 and 188.36

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Solution

The fourth proportional to 207.92, 310.54 and 188.36 is: 281.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.92 : 310.54 = 188.36 : x
  2. Step 2: Convert to fraction form
    207.92/310.54 = 188.36/x
  3. Step 3: Cross multiply
    207.92x = 310.54 × 188.36
  4. Step 4: Simplify right side
    207.92x = 58,493.31
  5. Step 5: Solve for x
    x = 58,493.31/207.92
  6. Step 6: Final answer
    x = 281.33

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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.