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Finding the Third Proportional to 4,480 and 5,920

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Solution

The third proportional to 4,480 and 5,920 is: 7,822.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,480 : 5,920 = 5,920 : x
  2. Step 2: Convert to fraction form
    4,480/5,920 = 5,920/x
  3. Step 3: Cross multiply
    4,480x = 5,920 × 5,920
  4. Step 4: Simplify right side
    4,480x = 35,046,400
  5. Step 5: Solve for x
    x = 35,046,400/4,480
  6. Step 6: Final answer
    x = 7,822.86

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.