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Finding the Third Proportional to 3,607 and 4,208

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Solution

The third proportional to 3,607 and 4,208 is: 4,909.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,607 : 4,208 = 4,208 : x
  2. Step 2: Convert to fraction form
    3,607/4,208 = 4,208/x
  3. Step 3: Cross multiply
    3,607x = 4,208 × 4,208
  4. Step 4: Simplify right side
    3,607x = 17,707,264
  5. Step 5: Solve for x
    x = 17,707,264/3,607
  6. Step 6: Final answer
    x = 4,909.14

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.