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Finding the Third Proportional to 618.38 and 1,358.63

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Solution

The third proportional to 618.38 and 1,358.63 is: 2,985.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.38 : 1,358.63 = 1,358.63 : x
  2. Step 2: Convert to fraction form
    618.38/1,358.63 = 1,358.63/x
  3. Step 3: Cross multiply
    618.38x = 1,358.63 × 1,358.63
  4. Step 4: Simplify right side
    618.38x = 1,845,861.89
  5. Step 5: Solve for x
    x = 1,845,861.89/618.38
  6. Step 6: Final answer
    x = 2,985.02

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.