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Finding the Fourth Proportional to 207.71, 310.89 and 191.33

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Solution

The fourth proportional to 207.71, 310.89 and 191.33 is: 286.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.71 : 310.89 = 191.33 : x
  2. Step 2: Convert to fraction form
    207.71/310.89 = 191.33/x
  3. Step 3: Cross multiply
    207.71x = 310.89 × 191.33
  4. Step 4: Simplify right side
    207.71x = 59,482.58
  5. Step 5: Solve for x
    x = 59,482.58/207.71
  6. Step 6: Final answer
    x = 286.37

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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.