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Finding the Third Proportional to 4.38 and 5.62

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Solution

The third proportional to 4.38 and 5.62 is: 7.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.38 : 5.62 = 5.62 : x
  2. Step 2: Convert to fraction form
    4.38/5.62 = 5.62/x
  3. Step 3: Cross multiply
    4.38x = 5.62 × 5.62
  4. Step 4: Simplify right side
    4.38x = 31.57
  5. Step 5: Solve for x
    x = 31.57/4.38
  6. Step 6: Final answer
    x = 7.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.