Home / 860,857.20-1,291,285.80-261,813.60

Finding the Fourth Proportional to 860,857.20, 1,291,285.80 and 261,813.60

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Solution

The fourth proportional to 860,857.20, 1,291,285.80 and 261,813.60 is: 392,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,857.20 : 1,291,285.80 = 261,813.60 : x
  2. Step 2: Convert to fraction form
    860,857.20/1,291,285.80 = 261,813.60/x
  3. Step 3: Cross multiply
    860,857.20x = 1,291,285.80 × 261,813.60
  4. Step 4: Simplify right side
    860,857.20x = 338,076,183,926.88
  5. Step 5: Solve for x
    x = 338,076,183,926.88/860,857.20
  6. Step 6: Final answer
    x = 392,720.40

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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.