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Finding the Third Proportional to 2,153 and 2,603

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Solution

The third proportional to 2,153 and 2,603 is: 3,147.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153 : 2,603 = 2,603 : x
  2. Step 2: Convert to fraction form
    2,153/2,603 = 2,603/x
  3. Step 3: Cross multiply
    2,153x = 2,603 × 2,603
  4. Step 4: Simplify right side
    2,153x = 6,775,609
  5. Step 5: Solve for x
    x = 6,775,609/2,153
  6. Step 6: Final answer
    x = 3,147.05

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.