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Finding the Third Proportional to 387 and 960

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Solution

The third proportional to 387 and 960 is: 2,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387 : 960 = 960 : x
  2. Step 2: Convert to fraction form
    387/960 = 960/x
  3. Step 3: Cross multiply
    387x = 960 × 960
  4. Step 4: Simplify right side
    387x = 921,600
  5. Step 5: Solve for x
    x = 921,600/387
  6. Step 6: Final answer
    x = 2,381.40

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Why These Related Problems?

These problems maintain the same ratio (2.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.