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Finding the Fourth Proportional to 256,398.31, 353,833.41 and 141,679.61

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Solution

The fourth proportional to 256,398.31, 353,833.41 and 141,679.61 is: 195,519.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,398.31 : 353,833.41 = 141,679.61 : x
  2. Step 2: Convert to fraction form
    256,398.31/353,833.41 = 141,679.61/x
  3. Step 3: Cross multiply
    256,398.31x = 353,833.41 × 141,679.61
  4. Step 4: Simplify right side
    256,398.31x = 50,130,979,047.43
  5. Step 5: Solve for x
    x = 50,130,979,047.43/256,398.31
  6. Step 6: Final answer
    x = 195,519.93

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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.