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Finding the Third Proportional to 1,389.66 and 3,026.11

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Solution

The third proportional to 1,389.66 and 3,026.11 is: 6,589.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.66 : 3,026.11 = 3,026.11 : x
  2. Step 2: Convert to fraction form
    1,389.66/3,026.11 = 3,026.11/x
  3. Step 3: Cross multiply
    1,389.66x = 3,026.11 × 3,026.11
  4. Step 4: Simplify right side
    1,389.66x = 9,157,337.95
  5. Step 5: Solve for x
    x = 9,157,337.95/1,389.66
  6. Step 6: Final answer
    x = 6,589.64

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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.