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Finding the Third Proportional to 618.13 and 929.75

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Solution

The third proportional to 618.13 and 929.75 is: 1,398.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.13 : 929.75 = 929.75 : x
  2. Step 2: Convert to fraction form
    618.13/929.75 = 929.75/x
  3. Step 3: Cross multiply
    618.13x = 929.75 × 929.75
  4. Step 4: Simplify right side
    618.13x = 864,435.06
  5. Step 5: Solve for x
    x = 864,435.06/618.13
  6. Step 6: Final answer
    x = 1,398.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.