Home / 860,855.20-1,291,282.80-261,811.60

Finding the Fourth Proportional to 860,855.20, 1,291,282.80 and 261,811.60

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Solution

The fourth proportional to 860,855.20, 1,291,282.80 and 261,811.60 is: 392,717.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,855.20 : 1,291,282.80 = 261,811.60 : x
  2. Step 2: Convert to fraction form
    860,855.20/1,291,282.80 = 261,811.60/x
  3. Step 3: Cross multiply
    860,855.20x = 1,291,282.80 × 261,811.60
  4. Step 4: Simplify right side
    860,855.20x = 338,072,815,920.48
  5. Step 5: Solve for x
    x = 338,072,815,920.48/860,855.20
  6. Step 6: Final answer
    x = 392,717.40

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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.