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Finding the Fourth Proportional to 256,753.86, 354,318.24 and 143,576.61

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Solution

The fourth proportional to 256,753.86, 354,318.24 and 143,576.61 is: 198,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,753.86 : 354,318.24 = 143,576.61 : x
  2. Step 2: Convert to fraction form
    256,753.86/354,318.24 = 143,576.61/x
  3. Step 3: Cross multiply
    256,753.86x = 354,318.24 × 143,576.61
  4. Step 4: Simplify right side
    256,753.86x = 50,871,811,760.37
  5. Step 5: Solve for x
    x = 50,871,811,760.37/256,753.86
  6. Step 6: Final answer
    x = 198,134.55

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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.