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Finding the Fourth Proportional to 281.88, 423.06 and 111

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Solution

The fourth proportional to 281.88, 423.06 and 111 is: 166.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.88 : 423.06 = 111 : x
  2. Step 2: Convert to fraction form
    281.88/423.06 = 111/x
  3. Step 3: Cross multiply
    281.88x = 423.06 × 111
  4. Step 4: Simplify right side
    281.88x = 46,959.66
  5. Step 5: Solve for x
    x = 46,959.66/281.88
  6. Step 6: Final answer
    x = 166.59

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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.