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Finding the Third Proportional to 612.75 and 908.63

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Solution

The third proportional to 612.75 and 908.63 is: 1,347.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.75 : 908.63 = 908.63 : x
  2. Step 2: Convert to fraction form
    612.75/908.63 = 908.63/x
  3. Step 3: Cross multiply
    612.75x = 908.63 × 908.63
  4. Step 4: Simplify right side
    612.75x = 825,599.39
  5. Step 5: Solve for x
    x = 825,599.39/612.75
  6. Step 6: Final answer
    x = 1,347.37

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.