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Finding the Fourth Proportional to 206.12, 282.28 and 203.42

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Solution

The fourth proportional to 206.12, 282.28 and 203.42 is: 278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.12 : 282.28 = 203.42 : x
  2. Step 2: Convert to fraction form
    206.12/282.28 = 203.42/x
  3. Step 3: Cross multiply
    206.12x = 282.28 × 203.42
  4. Step 4: Simplify right side
    206.12x = 57,421.40
  5. Step 5: Solve for x
    x = 57,421.40/206.12
  6. Step 6: Final answer
    x = 278.58

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.