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Finding the Fourth Proportional to 831,994.90, 1,247,996 and 263,378.78

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Solution

The fourth proportional to 831,994.90, 1,247,996 and 263,378.78 is: 395,069.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,994.90 : 1,247,996 = 263,378.78 : x
  2. Step 2: Convert to fraction form
    831,994.90/1,247,996 = 263,378.78/x
  3. Step 3: Cross multiply
    831,994.90x = 1,247,996 × 263,378.78
  4. Step 4: Simplify right side
    831,994.90x = 328,695,663,924.88
  5. Step 5: Solve for x
    x = 328,695,663,924.88/831,994.90
  6. Step 6: Final answer
    x = 395,069.33

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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.