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Finding the Fourth Proportional to 269.02, 403.38 and 138.88

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Solution

The fourth proportional to 269.02, 403.38 and 138.88 is: 208.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.02 : 403.38 = 138.88 : x
  2. Step 2: Convert to fraction form
    269.02/403.38 = 138.88/x
  3. Step 3: Cross multiply
    269.02x = 403.38 × 138.88
  4. Step 4: Simplify right side
    269.02x = 56,021.41
  5. Step 5: Solve for x
    x = 56,021.41/269.02
  6. Step 6: Final answer
    x = 208.24

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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.