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Finding the Fourth Proportional to 659,912.90, 991,072.20 and 577,244.30

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Solution

The fourth proportional to 659,912.90, 991,072.20 and 577,244.30 is: 866,918.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,912.90 : 991,072.20 = 577,244.30 : x
  2. Step 2: Convert to fraction form
    659,912.90/991,072.20 = 577,244.30/x
  3. Step 3: Cross multiply
    659,912.90x = 991,072.20 × 577,244.30
  4. Step 4: Simplify right side
    659,912.90x = 572,090,778,338.46
  5. Step 5: Solve for x
    x = 572,090,778,338.46/659,912.90
  6. Step 6: Final answer
    x = 866,918.62

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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.