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Finding the Fourth Proportional to 665,401.81, 998,960.77 and 571,237.11

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Solution

The fourth proportional to 665,401.81, 998,960.77 and 571,237.11 is: 857,592.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,401.81 : 998,960.77 = 571,237.11 : x
  2. Step 2: Convert to fraction form
    665,401.81/998,960.77 = 571,237.11/x
  3. Step 3: Cross multiply
    665,401.81x = 998,960.77 × 571,237.11
  4. Step 4: Simplify right side
    665,401.81x = 570,643,465,578.83
  5. Step 5: Solve for x
    x = 570,643,465,578.83/665,401.81
  6. Step 6: Final answer
    x = 857,592.29

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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.