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Finding the Fourth Proportional to 620,304, 855,611.28 and 447,934.92

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Solution

The fourth proportional to 620,304, 855,611.28 and 447,934.92 is: 617,855.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,304 : 855,611.28 = 447,934.92 : x
  2. Step 2: Convert to fraction form
    620,304/855,611.28 = 447,934.92/x
  3. Step 3: Cross multiply
    620,304x = 855,611.28 × 447,934.92
  4. Step 4: Simplify right side
    620,304x = 383,258,170,257.90
  5. Step 5: Solve for x
    x = 383,258,170,257.90/620,304
  6. Step 6: Final answer
    x = 617,855.39

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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.