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Finding the Fourth Proportional to 205.48, 283.62 and 118.21

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Solution

The fourth proportional to 205.48, 283.62 and 118.21 is: 163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.48 : 283.62 = 118.21 : x
  2. Step 2: Convert to fraction form
    205.48/283.62 = 118.21/x
  3. Step 3: Cross multiply
    205.48x = 283.62 × 118.21
  4. Step 4: Simplify right side
    205.48x = 33,526.72
  5. Step 5: Solve for x
    x = 33,526.72/205.48
  6. Step 6: Final answer
    x = 163.16

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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.