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Finding the Fourth Proportional to 207.55, 311.33 and 162.60

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Solution

The fourth proportional to 207.55, 311.33 and 162.60 is: 243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.55 : 311.33 = 162.60 : x
  2. Step 2: Convert to fraction form
    207.55/311.33 = 162.60/x
  3. Step 3: Cross multiply
    207.55x = 311.33 × 162.60
  4. Step 4: Simplify right side
    207.55x = 50,622.26
  5. Step 5: Solve for x
    x = 50,622.26/207.55
  6. Step 6: Final answer
    x = 243.90

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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.