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Finding the Third Proportional to 3.57 and 5.40

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Solution

The third proportional to 3.57 and 5.40 is: 8.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.57 : 5.40 = 5.40 : x
  2. Step 2: Convert to fraction form
    3.57/5.40 = 5.40/x
  3. Step 3: Cross multiply
    3.57x = 5.40 × 5.40
  4. Step 4: Simplify right side
    3.57x = 29.12
  5. Step 5: Solve for x
    x = 29.12/3.57
  6. Step 6: Final answer
    x = 8.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.