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Finding the Fourth Proportional to 4, 5.51 and 3.42

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Solution

The fourth proportional to 4, 5.51 and 3.42 is: 4.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4 : 5.51 = 3.42 : x
  2. Step 2: Convert to fraction form
    4/5.51 = 3.42/x
  3. Step 3: Cross multiply
    4x = 5.51 × 3.42
  4. Step 4: Simplify right side
    4x = 18.84
  5. Step 5: Solve for x
    x = 18.84/4
  6. Step 6: Final answer
    x = 4.71

Related Problems

Find fourth proportional to 2, 2.76 and 1.71
Half scale
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Double scale
Find fourth proportional to 5, 6.89 and 4.42
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.