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Finding the Fourth Proportional to 393,711.35, 590,660.88 and 127,471.94

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Solution

The fourth proportional to 393,711.35, 590,660.88 and 127,471.94 is: 191,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,711.35 : 590,660.88 = 127,471.94 : x
  2. Step 2: Convert to fraction form
    393,711.35/590,660.88 = 127,471.94/x
  3. Step 3: Cross multiply
    393,711.35x = 590,660.88 × 127,471.94
  4. Step 4: Simplify right side
    393,711.35x = 75,292,687,039.36
  5. Step 5: Solve for x
    x = 75,292,687,039.36/393,711.35
  6. Step 6: Final answer
    x = 191,238.30

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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.