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Finding the Fourth Proportional to 429,778.22, 643,781.39 and 251,745.48

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Solution

The fourth proportional to 429,778.22, 643,781.39 and 251,745.48 is: 377,099.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,778.22 : 643,781.39 = 251,745.48 : x
  2. Step 2: Convert to fraction form
    429,778.22/643,781.39 = 251,745.48/x
  3. Step 3: Cross multiply
    429,778.22x = 643,781.39 × 251,745.48
  4. Step 4: Simplify right side
    429,778.22x = 162,069,053,781.89
  5. Step 5: Solve for x
    x = 162,069,053,781.89/429,778.22
  6. Step 6: Final answer
    x = 377,099.28

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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.