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Finding the Third Proportional to 31,344 and 48,640

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Solution

The third proportional to 31,344 and 48,640 is: 75,480.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,344 : 48,640 = 48,640 : x
  2. Step 2: Convert to fraction form
    31,344/48,640 = 48,640/x
  3. Step 3: Cross multiply
    31,344x = 48,640 × 48,640
  4. Step 4: Simplify right side
    31,344x = 2,365,849,600
  5. Step 5: Solve for x
    x = 2,365,849,600/31,344
  6. Step 6: Final answer
    x = 75,480.14

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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.