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Finding the Third Proportional to 2,278 and 3,520

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Solution

The third proportional to 2,278 and 3,520 is: 5,439.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278 : 3,520 = 3,520 : x
  2. Step 2: Convert to fraction form
    2,278/3,520 = 3,520/x
  3. Step 3: Cross multiply
    2,278x = 3,520 × 3,520
  4. Step 4: Simplify right side
    2,278x = 12,390,400
  5. Step 5: Solve for x
    x = 12,390,400/2,278
  6. Step 6: Final answer
    x = 5,439.16

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.