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Finding the Fourth Proportional to 607,906.80, 911,860.20 and 187,311.60

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Solution

The fourth proportional to 607,906.80, 911,860.20 and 187,311.60 is: 280,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,906.80 : 911,860.20 = 187,311.60 : x
  2. Step 2: Convert to fraction form
    607,906.80/911,860.20 = 187,311.60/x
  3. Step 3: Cross multiply
    607,906.80x = 911,860.20 × 187,311.60
  4. Step 4: Simplify right side
    607,906.80x = 170,801,993,038.32
  5. Step 5: Solve for x
    x = 170,801,993,038.32/607,906.80
  6. Step 6: Final answer
    x = 280,967.40

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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.