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Finding the Fourth Proportional to 541,811.20, 811,939.20 and 398,538.40

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Solution

The fourth proportional to 541,811.20, 811,939.20 and 398,538.40 is: 597,235.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,811.20 : 811,939.20 = 398,538.40 : x
  2. Step 2: Convert to fraction form
    541,811.20/811,939.20 = 398,538.40/x
  3. Step 3: Cross multiply
    541,811.20x = 811,939.20 × 398,538.40
  4. Step 4: Simplify right side
    541,811.20x = 323,588,949,665.28
  5. Step 5: Solve for x
    x = 323,588,949,665.28/541,811.20
  6. Step 6: Final answer
    x = 597,235.62

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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.