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Finding the Fourth Proportional to 623,321.20, 935,419.20 and 399,226.60

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Solution

The fourth proportional to 623,321.20, 935,419.20 and 399,226.60 is: 599,120.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,321.20 : 935,419.20 = 399,226.60 : x
  2. Step 2: Convert to fraction form
    623,321.20/935,419.20 = 399,226.60/x
  3. Step 3: Cross multiply
    623,321.20x = 935,419.20 × 399,226.60
  4. Step 4: Simplify right side
    623,321.20x = 373,444,226,790.72
  5. Step 5: Solve for x
    x = 373,444,226,790.72/623,321.20
  6. Step 6: Final answer
    x = 599,120.05

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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.