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Finding the Fourth Proportional to 269.01, 403.38 and 138.99

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Solution

The fourth proportional to 269.01, 403.38 and 138.99 is: 208.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.01 : 403.38 = 138.99 : x
  2. Step 2: Convert to fraction form
    269.01/403.38 = 138.99/x
  3. Step 3: Cross multiply
    269.01x = 403.38 × 138.99
  4. Step 4: Simplify right side
    269.01x = 56,065.79
  5. Step 5: Solve for x
    x = 56,065.79/269.01
  6. Step 6: Final answer
    x = 208.42

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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.