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Finding the Fourth Proportional to 390,183.92, 538,450.56 and 274,060.52

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Solution

The fourth proportional to 390,183.92, 538,450.56 and 274,060.52 is: 378,201.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,183.92 : 538,450.56 = 274,060.52 : x
  2. Step 2: Convert to fraction form
    390,183.92/538,450.56 = 274,060.52/x
  3. Step 3: Cross multiply
    390,183.92x = 538,450.56 × 274,060.52
  4. Step 4: Simplify right side
    390,183.92x = 147,568,040,467.89
  5. Step 5: Solve for x
    x = 147,568,040,467.89/390,183.92
  6. Step 6: Final answer
    x = 378,201.24

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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.