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Finding the Fourth Proportional to 205.83, 284.01 and 122.91

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Solution

The fourth proportional to 205.83, 284.01 and 122.91 is: 169.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.83 : 284.01 = 122.91 : x
  2. Step 2: Convert to fraction form
    205.83/284.01 = 122.91/x
  3. Step 3: Cross multiply
    205.83x = 284.01 × 122.91
  4. Step 4: Simplify right side
    205.83x = 34,907.67
  5. Step 5: Solve for x
    x = 34,907.67/205.83
  6. Step 6: Final answer
    x = 169.59

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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.