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Finding the Fourth Proportional to 256,291.92, 353,665.80 and 143,092.56

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Solution

The fourth proportional to 256,291.92, 353,665.80 and 143,092.56 is: 197,458.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,291.92 : 353,665.80 = 143,092.56 : x
  2. Step 2: Convert to fraction form
    256,291.92/353,665.80 = 143,092.56/x
  3. Step 3: Cross multiply
    256,291.92x = 353,665.80 × 143,092.56
  4. Step 4: Simplify right side
    256,291.92x = 50,606,944,706.45
  5. Step 5: Solve for x
    x = 50,606,944,706.45/256,291.92
  6. Step 6: Final answer
    x = 197,458.21

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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.