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Finding the Fourth Proportional to 251,879.60, 378,256.80 and 133,781.60

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Solution

The fourth proportional to 251,879.60, 378,256.80 and 133,781.60 is: 200,904.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,879.60 : 378,256.80 = 133,781.60 : x
  2. Step 2: Convert to fraction form
    251,879.60/378,256.80 = 133,781.60/x
  3. Step 3: Cross multiply
    251,879.60x = 378,256.80 × 133,781.60
  4. Step 4: Simplify right side
    251,879.60x = 50,603,799,914.88
  5. Step 5: Solve for x
    x = 50,603,799,914.88/251,879.60
  6. Step 6: Final answer
    x = 200,904.72

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1.5x scale

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.