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Finding the Fourth Proportional to 394,797.49, 592,063.62 and 128,495.38

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Solution

The fourth proportional to 394,797.49, 592,063.62 and 128,495.38 is: 192,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,797.49 : 592,063.62 = 128,495.38 : x
  2. Step 2: Convert to fraction form
    394,797.49/592,063.62 = 128,495.38/x
  3. Step 3: Cross multiply
    394,797.49x = 592,063.62 × 128,495.38
  4. Step 4: Simplify right side
    394,797.49x = 76,077,439,836.08
  5. Step 5: Solve for x
    x = 76,077,439,836.08/394,797.49
  6. Step 6: Final answer
    x = 192,699.91

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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.