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Finding the Fourth Proportional to 687,874.64, 949,253.69 and 381,935.21

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Solution

The fourth proportional to 687,874.64, 949,253.69 and 381,935.21 is: 527,063.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,874.64 : 949,253.69 = 381,935.21 : x
  2. Step 2: Convert to fraction form
    687,874.64/949,253.69 = 381,935.21/x
  3. Step 3: Cross multiply
    687,874.64x = 949,253.69 × 381,935.21
  4. Step 4: Simplify right side
    687,874.64x = 362,553,405,523.75
  5. Step 5: Solve for x
    x = 362,553,405,523.75/687,874.64
  6. Step 6: Final answer
    x = 527,063.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.