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Finding the Fourth Proportional to 499.64, 749.30 and 211

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Solution

The fourth proportional to 499.64, 749.30 and 211 is: 316.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.64 : 749.30 = 211 : x
  2. Step 2: Convert to fraction form
    499.64/749.30 = 211/x
  3. Step 3: Cross multiply
    499.64x = 749.30 × 211
  4. Step 4: Simplify right side
    499.64x = 158,102.30
  5. Step 5: Solve for x
    x = 158,102.30/499.64
  6. Step 6: Final answer
    x = 316.43

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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.