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Finding the Fourth Proportional to 611,209.50, 917,773.87 and 517,666.05

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Solution

The fourth proportional to 611,209.50, 917,773.87 and 517,666.05 is: 777,311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,209.50 : 917,773.87 = 517,666.05 : x
  2. Step 2: Convert to fraction form
    611,209.50/917,773.87 = 517,666.05/x
  3. Step 3: Cross multiply
    611,209.50x = 917,773.87 × 517,666.05
  4. Step 4: Simplify right side
    611,209.50x = 475,100,374,076.11
  5. Step 5: Solve for x
    x = 475,100,374,076.11/611,209.50
  6. Step 6: Final answer
    x = 777,311.83

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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.