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Finding the Third Proportional to 4,315 and 6,689

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Solution

The third proportional to 4,315 and 6,689 is: 10,369.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,315 : 6,689 = 6,689 : x
  2. Step 2: Convert to fraction form
    4,315/6,689 = 6,689/x
  3. Step 3: Cross multiply
    4,315x = 6,689 × 6,689
  4. Step 4: Simplify right side
    4,315x = 44,742,721
  5. Step 5: Solve for x
    x = 44,742,721/4,315
  6. Step 6: Final answer
    x = 10,369.11

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.