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Finding the Fourth Proportional to 5.67, 7.82 and 4.76

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Solution

The fourth proportional to 5.67, 7.82 and 4.76 is: 6.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.67 : 7.82 = 4.76 : x
  2. Step 2: Convert to fraction form
    5.67/7.82 = 4.76/x
  3. Step 3: Cross multiply
    5.67x = 7.82 × 4.76
  4. Step 4: Simplify right side
    5.67x = 37.21
  5. Step 5: Solve for x
    x = 37.21/5.67
  6. Step 6: Final answer
    x = 6.56

Related Problems

Find fourth proportional to 2.84, 3.91 and 2.38
Half scale
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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.