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Finding the Fourth Proportional to 398,230.20, 597,345.30 and 256,512.60

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Solution

The fourth proportional to 398,230.20, 597,345.30 and 256,512.60 is: 384,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,230.20 : 597,345.30 = 256,512.60 : x
  2. Step 2: Convert to fraction form
    398,230.20/597,345.30 = 256,512.60/x
  3. Step 3: Cross multiply
    398,230.20x = 597,345.30 × 256,512.60
  4. Step 4: Simplify right side
    398,230.20x = 153,226,596,000.78
  5. Step 5: Solve for x
    x = 153,226,596,000.78/398,230.20
  6. Step 6: Final answer
    x = 384,768.90

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Similar ratio
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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.