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Finding the Fourth Proportional to 206.57, 285.80 and 199.08

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Solution

The fourth proportional to 206.57, 285.80 and 199.08 is: 275.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.57 : 285.80 = 199.08 : x
  2. Step 2: Convert to fraction form
    206.57/285.80 = 199.08/x
  3. Step 3: Cross multiply
    206.57x = 285.80 × 199.08
  4. Step 4: Simplify right side
    206.57x = 56,896.07
  5. Step 5: Solve for x
    x = 56,896.07/206.57
  6. Step 6: Final answer
    x = 275.43

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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.