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Finding the Fourth Proportional to 207.45, 311.16 and 156.35

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Solution

The fourth proportional to 207.45, 311.16 and 156.35 is: 234.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.45 : 311.16 = 156.35 : x
  2. Step 2: Convert to fraction form
    207.45/311.16 = 156.35/x
  3. Step 3: Cross multiply
    207.45x = 311.16 × 156.35
  4. Step 4: Simplify right side
    207.45x = 48,650.35
  5. Step 5: Solve for x
    x = 48,650.35/207.45
  6. Step 6: Final answer
    x = 234.52

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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.