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Finding the Fourth Proportional to 205.79, 283.98 and 112.54

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Solution

The fourth proportional to 205.79, 283.98 and 112.54 is: 155.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.79 : 283.98 = 112.54 : x
  2. Step 2: Convert to fraction form
    205.79/283.98 = 112.54/x
  3. Step 3: Cross multiply
    205.79x = 283.98 × 112.54
  4. Step 4: Simplify right side
    205.79x = 31,959.11
  5. Step 5: Solve for x
    x = 31,959.11/205.79
  6. Step 6: Final answer
    x = 155.30

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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.