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Finding the Fourth Proportional to 5.08, 7 and 4.92

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Solution

The fourth proportional to 5.08, 7 and 4.92 is: 6.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.08 : 7 = 4.92 : x
  2. Step 2: Convert to fraction form
    5.08/7 = 4.92/x
  3. Step 3: Cross multiply
    5.08x = 7 × 4.92
  4. Step 4: Simplify right side
    5.08x = 34.44
  5. Step 5: Solve for x
    x = 34.44/5.08
  6. Step 6: Final answer
    x = 6.78

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.