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Finding the Fourth Proportional to 205.16, 282.85 and 157.95

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Solution

The fourth proportional to 205.16, 282.85 and 157.95 is: 217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.16 : 282.85 = 157.95 : x
  2. Step 2: Convert to fraction form
    205.16/282.85 = 157.95/x
  3. Step 3: Cross multiply
    205.16x = 282.85 × 157.95
  4. Step 4: Simplify right side
    205.16x = 44,674.24
  5. Step 5: Solve for x
    x = 44,674.24/205.16
  6. Step 6: Final answer
    x = 217.76

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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.