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Finding the Third Proportional to 207.56 and 287.93

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Solution

The third proportional to 207.56 and 287.93 is: 399.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.56 : 287.93 = 287.93 : x
  2. Step 2: Convert to fraction form
    207.56/287.93 = 287.93/x
  3. Step 3: Cross multiply
    207.56x = 287.93 × 287.93
  4. Step 4: Simplify right side
    207.56x = 82,903.50
  5. Step 5: Solve for x
    x = 82,903.50/207.56
  6. Step 6: Final answer
    x = 399.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.