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Finding the Fourth Proportional to 515,553.09, 773,321.11 and 211,885.71

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Solution

The fourth proportional to 515,553.09, 773,321.11 and 211,885.71 is: 317,825.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,553.09 : 773,321.11 = 211,885.71 : x
  2. Step 2: Convert to fraction form
    515,553.09/773,321.11 = 211,885.71/x
  3. Step 3: Cross multiply
    515,553.09x = 773,321.11 × 211,885.71
  4. Step 4: Simplify right side
    515,553.09x = 163,855,692,450.34
  5. Step 5: Solve for x
    x = 163,855,692,450.34/515,553.09
  6. Step 6: Final answer
    x = 317,825.06

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1.5x scale

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.