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Finding the Third Proportional to 1,275.75 and 2,087.65

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Solution

The third proportional to 1,275.75 and 2,087.65 is: 3,416.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.75 : 2,087.65 = 2,087.65 : x
  2. Step 2: Convert to fraction form
    1,275.75/2,087.65 = 2,087.65/x
  3. Step 3: Cross multiply
    1,275.75x = 2,087.65 × 2,087.65
  4. Step 4: Simplify right side
    1,275.75x = 4,358,276.00
  5. Step 5: Solve for x
    x = 4,358,276.00/1,275.75
  6. Step 6: Final answer
    x = 3,416.25

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.