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Finding the Fourth Proportional to 447,137.58, 617,137.47 and 256,278.90

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Solution

The fourth proportional to 447,137.58, 617,137.47 and 256,278.90 is: 353,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,137.58 : 617,137.47 = 256,278.90 : x
  2. Step 2: Convert to fraction form
    447,137.58/617,137.47 = 256,278.90/x
  3. Step 3: Cross multiply
    447,137.58x = 617,137.47 × 256,278.90
  4. Step 4: Simplify right side
    447,137.58x = 158,159,311,960.38
  5. Step 5: Solve for x
    x = 158,159,311,960.38/447,137.58
  6. Step 6: Final answer
    x = 353,715.10

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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.