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Finding the Third Proportional to 3,486 and 5,709

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Solution

The third proportional to 3,486 and 5,709 is: 9,349.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486 : 5,709 = 5,709 : x
  2. Step 2: Convert to fraction form
    3,486/5,709 = 5,709/x
  3. Step 3: Cross multiply
    3,486x = 5,709 × 5,709
  4. Step 4: Simplify right side
    3,486x = 32,592,681
  5. Step 5: Solve for x
    x = 32,592,681/3,486
  6. Step 6: Final answer
    x = 9,349.59

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.