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Finding the Fourth Proportional to 404,999.60, 607,499.40 and 398,778.80

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Solution

The fourth proportional to 404,999.60, 607,499.40 and 398,778.80 is: 598,168.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,999.60 : 607,499.40 = 398,778.80 : x
  2. Step 2: Convert to fraction form
    404,999.60/607,499.40 = 398,778.80/x
  3. Step 3: Cross multiply
    404,999.60x = 607,499.40 × 398,778.80
  4. Step 4: Simplify right side
    404,999.60x = 242,257,881,732.72
  5. Step 5: Solve for x
    x = 242,257,881,732.72/404,999.60
  6. Step 6: Final answer
    x = 598,168.20

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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.