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Finding the Fourth Proportional to 205.00, 282.90 and 111.74

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Solution

The fourth proportional to 205.00, 282.90 and 111.74 is: 154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.00 : 282.90 = 111.74 : x
  2. Step 2: Convert to fraction form
    205.00/282.90 = 111.74/x
  3. Step 3: Cross multiply
    205.00x = 282.90 × 111.74
  4. Step 4: Simplify right side
    205.00x = 31,610.69
  5. Step 5: Solve for x
    x = 31,610.69/205.00
  6. Step 6: Final answer
    x = 154.20

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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.