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Finding the Fourth Proportional to 394,873.77, 592,310.20 and 128,633.86

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Solution

The fourth proportional to 394,873.77, 592,310.20 and 128,633.86 is: 192,950.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,873.77 : 592,310.20 = 128,633.86 : x
  2. Step 2: Convert to fraction form
    394,873.77/592,310.20 = 128,633.86/x
  3. Step 3: Cross multiply
    394,873.77x = 592,310.20 × 128,633.86
  4. Step 4: Simplify right side
    394,873.77x = 76,191,147,343.37
  5. Step 5: Solve for x
    x = 76,191,147,343.37/394,873.77
  6. Step 6: Final answer
    x = 192,950.64

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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.