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Finding the Third Proportional to 1,277 and 3,090.50

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Solution

The third proportional to 1,277 and 3,090.50 is: 7,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277 : 3,090.50 = 3,090.50 : x
  2. Step 2: Convert to fraction form
    1,277/3,090.50 = 3,090.50/x
  3. Step 3: Cross multiply
    1,277x = 3,090.50 × 3,090.50
  4. Step 4: Simplify right side
    1,277x = 9,551,190.25
  5. Step 5: Solve for x
    x = 9,551,190.25/1,277
  6. Step 6: Final answer
    x = 7,479.40

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.