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Finding the Third Proportional to 6,128 and 7,216

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Solution

The third proportional to 6,128 and 7,216 is: 8,497.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,128 : 7,216 = 7,216 : x
  2. Step 2: Convert to fraction form
    6,128/7,216 = 7,216/x
  3. Step 3: Cross multiply
    6,128x = 7,216 × 7,216
  4. Step 4: Simplify right side
    6,128x = 52,070,656
  5. Step 5: Solve for x
    x = 52,070,656/6,128
  6. Step 6: Final answer
    x = 8,497.17

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.