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Finding the Fourth Proportional to 647,756.80, 971,212.80 and 581,401.60

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Solution

The fourth proportional to 647,756.80, 971,212.80 and 581,401.60 is: 871,723.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,756.80 : 971,212.80 = 581,401.60 : x
  2. Step 2: Convert to fraction form
    647,756.80/971,212.80 = 581,401.60/x
  3. Step 3: Cross multiply
    647,756.80x = 971,212.80 × 581,401.60
  4. Step 4: Simplify right side
    647,756.80x = 564,664,675,860.48
  5. Step 5: Solve for x
    x = 564,664,675,860.48/647,756.80
  6. Step 6: Final answer
    x = 871,723.27

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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.