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Finding the Third Proportional to 2,420 and 5,307

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Solution

The third proportional to 2,420 and 5,307 is: 11,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420 : 5,307 = 5,307 : x
  2. Step 2: Convert to fraction form
    2,420/5,307 = 5,307/x
  3. Step 3: Cross multiply
    2,420x = 5,307 × 5,307
  4. Step 4: Simplify right side
    2,420x = 28,164,249
  5. Step 5: Solve for x
    x = 28,164,249/2,420
  6. Step 6: Final answer
    x = 11,638.12

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.