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Finding the Fourth Proportional to 269.22, 403.80 and 74.23

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Solution

The fourth proportional to 269.22, 403.80 and 74.23 is: 111.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.22 : 403.80 = 74.23 : x
  2. Step 2: Convert to fraction form
    269.22/403.80 = 74.23/x
  3. Step 3: Cross multiply
    269.22x = 403.80 × 74.23
  4. Step 4: Simplify right side
    269.22x = 29,975.08
  5. Step 5: Solve for x
    x = 29,975.08/269.22
  6. Step 6: Final answer
    x = 111.34

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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.