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Finding the Third Proportional to 2,275 and 2,989.50

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Solution

The third proportional to 2,275 and 2,989.50 is: 3,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275 : 2,989.50 = 2,989.50 : x
  2. Step 2: Convert to fraction form
    2,275/2,989.50 = 2,989.50/x
  3. Step 3: Cross multiply
    2,275x = 2,989.50 × 2,989.50
  4. Step 4: Simplify right side
    2,275x = 8,937,110.25
  5. Step 5: Solve for x
    x = 8,937,110.25/2,275
  6. Step 6: Final answer
    x = 3,928.40

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.