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Finding the Third Proportional to 3,840 and 5,127

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Solution

The third proportional to 3,840 and 5,127 is: 6,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840 : 5,127 = 5,127 : x
  2. Step 2: Convert to fraction form
    3,840/5,127 = 5,127/x
  3. Step 3: Cross multiply
    3,840x = 5,127 × 5,127
  4. Step 4: Simplify right side
    3,840x = 26,286,129
  5. Step 5: Solve for x
    x = 26,286,129/3,840
  6. Step 6: Final answer
    x = 6,845.35

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.