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Finding the Fourth Proportional to 207.38, 311.08 and 77.33

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Solution

The fourth proportional to 207.38, 311.08 and 77.33 is: 116.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.38 : 311.08 = 77.33 : x
  2. Step 2: Convert to fraction form
    207.38/311.08 = 77.33/x
  3. Step 3: Cross multiply
    207.38x = 311.08 × 77.33
  4. Step 4: Simplify right side
    207.38x = 24,055.43
  5. Step 5: Solve for x
    x = 24,055.43/207.38
  6. Step 6: Final answer
    x = 116.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.