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Finding the Third Proportional to 211,765.50 and 318,123

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Solution

The third proportional to 211,765.50 and 318,123 is: 477,897.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,765.50 : 318,123 = 318,123 : x
  2. Step 2: Convert to fraction form
    211,765.50/318,123 = 318,123/x
  3. Step 3: Cross multiply
    211,765.50x = 318,123 × 318,123
  4. Step 4: Simplify right side
    211,765.50x = 101,202,243,129
  5. Step 5: Solve for x
    x = 101,202,243,129/211,765.50
  6. Step 6: Final answer
    x = 477,897.69

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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.