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Finding the Fourth Proportional to 394,866.21, 592,298.86 and 128,626.30

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Solution

The fourth proportional to 394,866.21, 592,298.86 and 128,626.30 is: 192,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,866.21 : 592,298.86 = 128,626.30 : x
  2. Step 2: Convert to fraction form
    394,866.21/592,298.86 = 128,626.30/x
  3. Step 3: Cross multiply
    394,866.21x = 592,298.86 × 128,626.30
  4. Step 4: Simplify right side
    394,866.21x = 76,185,207,251.39
  5. Step 5: Solve for x
    x = 76,185,207,251.39/394,866.21
  6. Step 6: Final answer
    x = 192,939.29

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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.