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Finding the Fourth Proportional to 392,501.55, 541,621.26 and 222,735.68

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Solution

The fourth proportional to 392,501.55, 541,621.26 and 222,735.68 is: 307,357.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,501.55 : 541,621.26 = 222,735.68 : x
  2. Step 2: Convert to fraction form
    392,501.55/541,621.26 = 222,735.68/x
  3. Step 3: Cross multiply
    392,501.55x = 541,621.26 × 222,735.68
  4. Step 4: Simplify right side
    392,501.55x = 120,638,376,940.45
  5. Step 5: Solve for x
    x = 120,638,376,940.45/392,501.55
  6. Step 6: Final answer
    x = 307,357.71

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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.