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Finding the Fourth Proportional to 207.86, 309.52 and 205.58

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Solution

The fourth proportional to 207.86, 309.52 and 205.58 is: 306.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.86 : 309.52 = 205.58 : x
  2. Step 2: Convert to fraction form
    207.86/309.52 = 205.58/x
  3. Step 3: Cross multiply
    207.86x = 309.52 × 205.58
  4. Step 4: Simplify right side
    207.86x = 63,631.12
  5. Step 5: Solve for x
    x = 63,631.12/207.86
  6. Step 6: Final answer
    x = 306.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.