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Finding the Fourth Proportional to 891,353,190.80, 1,337,029,786.20 and 891,353,190.80

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Solution

The fourth proportional to 891,353,190.80, 1,337,029,786.20 and 891,353,190.80 is: 1,337,029,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,353,190.80 : 1,337,029,786.20 = 891,353,190.80 : x
  2. Step 2: Convert to fraction form
    891,353,190.80/1,337,029,786.20 = 891,353,190.80/x
  3. Step 3: Cross multiply
    891,353,190.80x = 1,337,029,786.20 × 891,353,190.80
  4. Step 4: Simplify right side
    891,353,190.80x = 1,191,765,766,124,011,776
  5. Step 5: Solve for x
    x = 1,191,765,766,124,011,776/891,353,190.80
  6. Step 6: Final answer
    x = 1,337,029,786.20

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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.