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Finding the Fourth Proportional to 378,811.78, 568,050.43 and 141,988.39

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Solution

The fourth proportional to 378,811.78, 568,050.43 and 141,988.39 is: 212,919.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,811.78 : 568,050.43 = 141,988.39 : x
  2. Step 2: Convert to fraction form
    378,811.78/568,050.43 = 141,988.39/x
  3. Step 3: Cross multiply
    378,811.78x = 568,050.43 × 141,988.39
  4. Step 4: Simplify right side
    378,811.78x = 80,656,564,219.41
  5. Step 5: Solve for x
    x = 80,656,564,219.41/378,811.78
  6. Step 6: Final answer
    x = 212,919.90

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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.