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Finding the Third Proportional to 1,640.25 and 2,551.50

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Solution

The third proportional to 1,640.25 and 2,551.50 is: 3,969

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.25 : 2,551.50 = 2,551.50 : x
  2. Step 2: Convert to fraction form
    1,640.25/2,551.50 = 2,551.50/x
  3. Step 3: Cross multiply
    1,640.25x = 2,551.50 × 2,551.50
  4. Step 4: Simplify right side
    1,640.25x = 6,510,152.25
  5. Step 5: Solve for x
    x = 6,510,152.25/1,640.25
  6. Step 6: Final answer
    x = 3,969

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.