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Finding the Fourth Proportional to 281.92, 388.77 and 211.98

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Solution

The fourth proportional to 281.92, 388.77 and 211.98 is: 292.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.92 : 388.77 = 211.98 : x
  2. Step 2: Convert to fraction form
    281.92/388.77 = 211.98/x
  3. Step 3: Cross multiply
    281.92x = 388.77 × 211.98
  4. Step 4: Simplify right side
    281.92x = 82,412.13
  5. Step 5: Solve for x
    x = 82,412.13/281.92
  6. Step 6: Final answer
    x = 292.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.