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Finding the Fourth Proportional to 393,661.71, 590,586.26 and 127,422.20

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Solution

The fourth proportional to 393,661.71, 590,586.26 and 127,422.20 is: 191,163.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,661.71 : 590,586.26 = 127,422.20 : x
  2. Step 2: Convert to fraction form
    393,661.71/590,586.26 = 127,422.20/x
  3. Step 3: Cross multiply
    393,661.71x = 590,586.26 × 127,422.20
  4. Step 4: Simplify right side
    393,661.71x = 75,253,796,948.93
  5. Step 5: Solve for x
    x = 75,253,796,948.93/393,661.71
  6. Step 6: Final answer
    x = 191,163.62

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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.