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Finding the Fourth Proportional to 512,191.20, 767,998.80 and 196,658.40

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Solution

The fourth proportional to 512,191.20, 767,998.80 and 196,658.40 is: 294,877.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,191.20 : 767,998.80 = 196,658.40 : x
  2. Step 2: Convert to fraction form
    512,191.20/767,998.80 = 196,658.40/x
  3. Step 3: Cross multiply
    512,191.20x = 767,998.80 × 196,658.40
  4. Step 4: Simplify right side
    512,191.20x = 151,033,415,209.92
  5. Step 5: Solve for x
    x = 151,033,415,209.92/512,191.20
  6. Step 6: Final answer
    x = 294,877.02

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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.