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Finding the Fourth Proportional to 207.87, 312.50 and 196.71

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Solution

The fourth proportional to 207.87, 312.50 and 196.71 is: 295.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.87 : 312.50 = 196.71 : x
  2. Step 2: Convert to fraction form
    207.87/312.50 = 196.71/x
  3. Step 3: Cross multiply
    207.87x = 312.50 × 196.71
  4. Step 4: Simplify right side
    207.87x = 61,471.88
  5. Step 5: Solve for x
    x = 61,471.88/207.87
  6. Step 6: Final answer
    x = 295.72

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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.