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Finding the Fourth Proportional to 503,439.23, 755,076.26 and 138,615.74

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Solution

The fourth proportional to 503,439.23, 755,076.26 and 138,615.74 is: 207,900.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,439.23 : 755,076.26 = 138,615.74 : x
  2. Step 2: Convert to fraction form
    503,439.23/755,076.26 = 138,615.74/x
  3. Step 3: Cross multiply
    503,439.23x = 755,076.26 × 138,615.74
  4. Step 4: Simplify right side
    503,439.23x = 104,665,450,067.87
  5. Step 5: Solve for x
    x = 104,665,450,067.87/503,439.23
  6. Step 6: Final answer
    x = 207,900.86

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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.