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Finding the Fourth Proportional to 269.74, 403.95 and 211.82

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Solution

The fourth proportional to 269.74, 403.95 and 211.82 is: 317.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.74 : 403.95 = 211.82 : x
  2. Step 2: Convert to fraction form
    269.74/403.95 = 211.82/x
  3. Step 3: Cross multiply
    269.74x = 403.95 × 211.82
  4. Step 4: Simplify right side
    269.74x = 85,566.77
  5. Step 5: Solve for x
    x = 85,566.77/269.74
  6. Step 6: Final answer
    x = 317.21

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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.