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Finding the Fourth Proportional to 394,812.55, 592,260.31 and 128,593.80

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Solution

The fourth proportional to 394,812.55, 592,260.31 and 128,593.80 is: 192,904.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,812.55 : 592,260.31 = 128,593.80 : x
  2. Step 2: Convert to fraction form
    394,812.55/592,260.31 = 128,593.80/x
  3. Step 3: Cross multiply
    394,812.55x = 592,260.31 × 128,593.80
  4. Step 4: Simplify right side
    394,812.55x = 76,161,003,852.08
  5. Step 5: Solve for x
    x = 76,161,003,852.08/394,812.55
  6. Step 6: Final answer
    x = 192,904.21

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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.