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Finding the Fourth Proportional to 0.04, 0.05 and 0.02

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Solution

The fourth proportional to 0.04, 0.05 and 0.02 is: 0.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.04 : 0.05 = 0.02 : x
  2. Step 2: Convert to fraction form
    0.04/0.05 = 0.02/x
  3. Step 3: Cross multiply
    0.04x = 0.05 × 0.02
  4. Step 4: Simplify right side
    0.04x = 0.00
  5. Step 5: Solve for x
    x = 0.00/0.04
  6. Step 6: Final answer
    x = 0.03

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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.