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Finding the Third Proportional to 1,940 and 5,240

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Solution

The third proportional to 1,940 and 5,240 is: 14,153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940 : 5,240 = 5,240 : x
  2. Step 2: Convert to fraction form
    1,940/5,240 = 5,240/x
  3. Step 3: Cross multiply
    1,940x = 5,240 × 5,240
  4. Step 4: Simplify right side
    1,940x = 27,457,600
  5. Step 5: Solve for x
    x = 27,457,600/1,940
  6. Step 6: Final answer
    x = 14,153.40

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.