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Finding the Fourth Proportional to 839,153.70, 1,255,778.10 and 768,294.90

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Solution

The fourth proportional to 839,153.70, 1,255,778.10 and 768,294.90 is: 1,149,739.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,153.70 : 1,255,778.10 = 768,294.90 : x
  2. Step 2: Convert to fraction form
    839,153.70/1,255,778.10 = 768,294.90/x
  3. Step 3: Cross multiply
    839,153.70x = 1,255,778.10 × 768,294.90
  4. Step 4: Simplify right side
    839,153.70x = 964,807,909,761.69
  5. Step 5: Solve for x
    x = 964,807,909,761.69/839,153.70
  6. Step 6: Final answer
    x = 1,149,739.21

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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.