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Finding the Fourth Proportional to 663,975.20, 996,999.60 and 384,039.20

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Solution

The fourth proportional to 663,975.20, 996,999.60 and 384,039.20 is: 576,658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,975.20 : 996,999.60 = 384,039.20 : x
  2. Step 2: Convert to fraction form
    663,975.20/996,999.60 = 384,039.20/x
  3. Step 3: Cross multiply
    663,975.20x = 996,999.60 × 384,039.20
  4. Step 4: Simplify right side
    663,975.20x = 382,886,928,784.32
  5. Step 5: Solve for x
    x = 382,886,928,784.32/663,975.20
  6. Step 6: Final answer
    x = 576,658.48

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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.