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Finding the Fourth Proportional to 0.15, 0.22 and 0.04

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Solution

The fourth proportional to 0.15, 0.22 and 0.04 is: 0.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.15 : 0.22 = 0.04 : x
  2. Step 2: Convert to fraction form
    0.15/0.22 = 0.04/x
  3. Step 3: Cross multiply
    0.15x = 0.22 × 0.04
  4. Step 4: Simplify right side
    0.15x = 0.01
  5. Step 5: Solve for x
    x = 0.01/0.15
  6. Step 6: Final answer
    x = 0.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.