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Finding the Third Proportional to 5,308 and 6,978

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Solution

The third proportional to 5,308 and 6,978 is: 9,173.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308 : 6,978 = 6,978 : x
  2. Step 2: Convert to fraction form
    5,308/6,978 = 6,978/x
  3. Step 3: Cross multiply
    5,308x = 6,978 × 6,978
  4. Step 4: Simplify right side
    5,308x = 48,692,484
  5. Step 5: Solve for x
    x = 48,692,484/5,308
  6. Step 6: Final answer
    x = 9,173.41

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.