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Finding the Fourth Proportional to 510,455.05, 765,808.70 and 211,021.27

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Solution

The fourth proportional to 510,455.05, 765,808.70 and 211,021.27 is: 316,584.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,455.05 : 765,808.70 = 211,021.27 : x
  2. Step 2: Convert to fraction form
    510,455.05/765,808.70 = 211,021.27/x
  3. Step 3: Cross multiply
    510,455.05x = 765,808.70 × 211,021.27
  4. Step 4: Simplify right side
    510,455.05x = 161,601,921,481.42
  5. Step 5: Solve for x
    x = 161,601,921,481.42/510,455.05
  6. Step 6: Final answer
    x = 316,584.04

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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.