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Finding the Fourth Proportional to 392,690.25, 541,914.62 and 220,615.47

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Solution

The fourth proportional to 392,690.25, 541,914.62 and 220,615.47 is: 304,450.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,690.25 : 541,914.62 = 220,615.47 : x
  2. Step 2: Convert to fraction form
    392,690.25/541,914.62 = 220,615.47/x
  3. Step 3: Cross multiply
    392,690.25x = 541,914.62 × 220,615.47
  4. Step 4: Simplify right side
    392,690.25x = 119,554,747,488.09
  5. Step 5: Solve for x
    x = 119,554,747,488.09/392,690.25
  6. Step 6: Final answer
    x = 304,450.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.