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Finding the Fourth Proportional to 4.23, 5.85 and 3.69

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Solution

The fourth proportional to 4.23, 5.85 and 3.69 is: 5.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.23 : 5.85 = 3.69 : x
  2. Step 2: Convert to fraction form
    4.23/5.85 = 3.69/x
  3. Step 3: Cross multiply
    4.23x = 5.85 × 3.69
  4. Step 4: Simplify right side
    4.23x = 21.59
  5. Step 5: Solve for x
    x = 21.59/4.23
  6. Step 6: Final answer
    x = 5.10

Related Problems

Find fourth proportional to 2.12, 2.93 and 1.85
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Double scale
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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.