Home / 860,811.20-1,291,216.80-261,767.60

Finding the Fourth Proportional to 860,811.20, 1,291,216.80 and 261,767.60

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Solution

The fourth proportional to 860,811.20, 1,291,216.80 and 261,767.60 is: 392,651.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,811.20 : 1,291,216.80 = 261,767.60 : x
  2. Step 2: Convert to fraction form
    860,811.20/1,291,216.80 = 261,767.60/x
  3. Step 3: Cross multiply
    860,811.20x = 1,291,216.80 × 261,767.60
  4. Step 4: Simplify right side
    860,811.20x = 337,998,722,815.68
  5. Step 5: Solve for x
    x = 337,998,722,815.68/860,811.20
  6. Step 6: Final answer
    x = 392,651.40

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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.