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Finding the Fourth Proportional to 665,600.80, 998,530.80 and 286,520.80

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Solution

The fourth proportional to 665,600.80, 998,530.80 and 286,520.80 is: 429,836.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,600.80 : 998,530.80 = 286,520.80 : x
  2. Step 2: Convert to fraction form
    665,600.80/998,530.80 = 286,520.80/x
  3. Step 3: Cross multiply
    665,600.80x = 998,530.80 × 286,520.80
  4. Step 4: Simplify right side
    665,600.80x = 286,099,843,640.64
  5. Step 5: Solve for x
    x = 286,099,843,640.64/665,600.80
  6. Step 6: Final answer
    x = 429,836.99

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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.