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Finding the Third Proportional to 1,393 and 2,718.50

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Solution

The third proportional to 1,393 and 2,718.50 is: 5,305.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393 : 2,718.50 = 2,718.50 : x
  2. Step 2: Convert to fraction form
    1,393/2,718.50 = 2,718.50/x
  3. Step 3: Cross multiply
    1,393x = 2,718.50 × 2,718.50
  4. Step 4: Simplify right side
    1,393x = 7,390,242.25
  5. Step 5: Solve for x
    x = 7,390,242.25/1,393
  6. Step 6: Final answer
    x = 5,305.27

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.