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Finding the Third Proportional to 618.75 and 743.63

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Solution

The third proportional to 618.75 and 743.63 is: 893.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.75 : 743.63 = 743.63 : x
  2. Step 2: Convert to fraction form
    618.75/743.63 = 743.63/x
  3. Step 3: Cross multiply
    618.75x = 743.63 × 743.63
  4. Step 4: Simplify right side
    618.75x = 552,978.14
  5. Step 5: Solve for x
    x = 552,978.14/618.75
  6. Step 6: Final answer
    x = 893.70

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These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.