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Finding the Fourth Proportional to 207.39, 309.29 and 200.55

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Solution

The fourth proportional to 207.39, 309.29 and 200.55 is: 299.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.39 : 309.29 = 200.55 : x
  2. Step 2: Convert to fraction form
    207.39/309.29 = 200.55/x
  3. Step 3: Cross multiply
    207.39x = 309.29 × 200.55
  4. Step 4: Simplify right side
    207.39x = 62,029.09
  5. Step 5: Solve for x
    x = 62,029.09/207.39
  6. Step 6: Final answer
    x = 299.10

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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.