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Finding the Fourth Proportional to 394,875.78, 592,313.20 and 128,635.86

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Solution

The fourth proportional to 394,875.78, 592,313.20 and 128,635.86 is: 192,953.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,875.78 : 592,313.20 = 128,635.86 : x
  2. Step 2: Convert to fraction form
    394,875.78/592,313.20 = 128,635.86/x
  3. Step 3: Cross multiply
    394,875.78x = 592,313.20 × 128,635.86
  4. Step 4: Simplify right side
    394,875.78x = 76,192,717,871.35
  5. Step 5: Solve for x
    x = 76,192,717,871.35/394,875.78
  6. Step 6: Final answer
    x = 192,953.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.