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Finding the Fourth Proportional to 393,529.43, 543,028.74 and 221,444.39

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Solution

The fourth proportional to 393,529.43, 543,028.74 and 221,444.39 is: 305,569.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,529.43 : 543,028.74 = 221,444.39 : x
  2. Step 2: Convert to fraction form
    393,529.43/543,028.74 = 221,444.39/x
  3. Step 3: Cross multiply
    393,529.43x = 543,028.74 × 221,444.39
  4. Step 4: Simplify right side
    393,529.43x = 120,250,668,081.77
  5. Step 5: Solve for x
    x = 120,250,668,081.77/393,529.43
  6. Step 6: Final answer
    x = 305,569.70

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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.