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Finding the Fourth Proportional to 394,940.52, 592,297.62 and 128,724.30

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Solution

The fourth proportional to 394,940.52, 592,297.62 and 128,724.30 is: 193,049.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,940.52 : 592,297.62 = 128,724.30 : x
  2. Step 2: Convert to fraction form
    394,940.52/592,297.62 = 128,724.30/x
  3. Step 3: Cross multiply
    394,940.52x = 592,297.62 × 128,724.30
  4. Step 4: Simplify right side
    394,940.52x = 76,243,096,526.17
  5. Step 5: Solve for x
    x = 76,243,096,526.17/394,940.52
  6. Step 6: Final answer
    x = 193,049.57

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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.