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Finding the Third Proportional to 621.75 and 1,352.63

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Solution

The third proportional to 621.75 and 1,352.63 is: 2,942.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.75 : 1,352.63 = 1,352.63 : x
  2. Step 2: Convert to fraction form
    621.75/1,352.63 = 1,352.63/x
  3. Step 3: Cross multiply
    621.75x = 1,352.63 × 1,352.63
  4. Step 4: Simplify right side
    621.75x = 1,829,594.39
  5. Step 5: Solve for x
    x = 1,829,594.39/621.75
  6. Step 6: Final answer
    x = 2,942.65

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.