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Finding the Fourth Proportional to 207.56, 311.38 and 180.32

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Solution

The fourth proportional to 207.56, 311.38 and 180.32 is: 270.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.56 : 311.38 = 180.32 : x
  2. Step 2: Convert to fraction form
    207.56/311.38 = 180.32/x
  3. Step 3: Cross multiply
    207.56x = 311.38 × 180.32
  4. Step 4: Simplify right side
    207.56x = 56,146.03
  5. Step 5: Solve for x
    x = 56,146.03/207.56
  6. Step 6: Final answer
    x = 270.50

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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.