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Finding the Fourth Proportional to 207.53, 309.38 and 197.81

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Solution

The fourth proportional to 207.53, 309.38 and 197.81 is: 294.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.53 : 309.38 = 197.81 : x
  2. Step 2: Convert to fraction form
    207.53/309.38 = 197.81/x
  3. Step 3: Cross multiply
    207.53x = 309.38 × 197.81
  4. Step 4: Simplify right side
    207.53x = 61,198.57
  5. Step 5: Solve for x
    x = 61,198.57/207.53
  6. Step 6: Final answer
    x = 294.89

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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.