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Finding the Third Proportional to 5,240 and 7,769

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Solution

The third proportional to 5,240 and 7,769 is: 11,518.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,240 : 7,769 = 7,769 : x
  2. Step 2: Convert to fraction form
    5,240/7,769 = 7,769/x
  3. Step 3: Cross multiply
    5,240x = 7,769 × 7,769
  4. Step 4: Simplify right side
    5,240x = 60,357,361
  5. Step 5: Solve for x
    x = 60,357,361/5,240
  6. Step 6: Final answer
    x = 11,518.58

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.