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Finding the Fourth Proportional to 643,696.42, 888,210.38 and 385,512.86

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Solution

The fourth proportional to 643,696.42, 888,210.38 and 385,512.86 is: 531,953.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,696.42 : 888,210.38 = 385,512.86 : x
  2. Step 2: Convert to fraction form
    643,696.42/888,210.38 = 385,512.86/x
  3. Step 3: Cross multiply
    643,696.42x = 888,210.38 × 385,512.86
  4. Step 4: Simplify right side
    643,696.42x = 342,416,519,434.44
  5. Step 5: Solve for x
    x = 342,416,519,434.44/643,696.42
  6. Step 6: Final answer
    x = 531,953.43

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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.