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Finding the Fourth Proportional to 522,664.40, 783,190.20 and 388,917.20

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Solution

The fourth proportional to 522,664.40, 783,190.20 and 388,917.20 is: 582,775.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,664.40 : 783,190.20 = 388,917.20 : x
  2. Step 2: Convert to fraction form
    522,664.40/783,190.20 = 388,917.20/x
  3. Step 3: Cross multiply
    522,664.40x = 783,190.20 × 388,917.20
  4. Step 4: Simplify right side
    522,664.40x = 304,596,139,651.44
  5. Step 5: Solve for x
    x = 304,596,139,651.44/522,664.40
  6. Step 6: Final answer
    x = 582,775.75

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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.