Home / 392,427.78-541,653.90-231,390.12

Finding the Fourth Proportional to 392,427.78, 541,653.90 and 231,390.12

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Solution

The fourth proportional to 392,427.78, 541,653.90 and 231,390.12 is: 319,379.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,427.78 : 541,653.90 = 231,390.12 : x
  2. Step 2: Convert to fraction form
    392,427.78/541,653.90 = 231,390.12/x
  3. Step 3: Cross multiply
    392,427.78x = 541,653.90 × 231,390.12
  4. Step 4: Simplify right side
    392,427.78x = 125,333,360,919.47
  5. Step 5: Solve for x
    x = 125,333,360,919.47/392,427.78
  6. Step 6: Final answer
    x = 319,379.43

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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.