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Finding the Fourth Proportional to 393,944.72, 543,583.71 and 221,853.63

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Solution

The fourth proportional to 393,944.72, 543,583.71 and 221,853.63 is: 306,124.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,944.72 : 543,583.71 = 221,853.63 : x
  2. Step 2: Convert to fraction form
    393,944.72/543,583.71 = 221,853.63/x
  3. Step 3: Cross multiply
    393,944.72x = 543,583.71 × 221,853.63
  4. Step 4: Simplify right side
    393,944.72x = 120,596,021,310.81
  5. Step 5: Solve for x
    x = 120,596,021,310.81/393,944.72
  6. Step 6: Final answer
    x = 306,124.23

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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.