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Finding the Third Proportional to 3,080 and 4,712

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Solution

The third proportional to 3,080 and 4,712 is: 7,208.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,080 : 4,712 = 4,712 : x
  2. Step 2: Convert to fraction form
    3,080/4,712 = 4,712/x
  3. Step 3: Cross multiply
    3,080x = 4,712 × 4,712
  4. Step 4: Simplify right side
    3,080x = 22,202,944
  5. Step 5: Solve for x
    x = 22,202,944/3,080
  6. Step 6: Final answer
    x = 7,208.75

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.