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Finding the Fourth Proportional to 490,906.60, 677,415.78 and 276,077.80

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Solution

The fourth proportional to 490,906.60, 677,415.78 and 276,077.80 is: 380,967.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,906.60 : 677,415.78 = 276,077.80 : x
  2. Step 2: Convert to fraction form
    490,906.60/677,415.78 = 276,077.80/x
  3. Step 3: Cross multiply
    490,906.60x = 677,415.78 × 276,077.80
  4. Step 4: Simplify right side
    490,906.60x = 187,019,458,227.68
  5. Step 5: Solve for x
    x = 187,019,458,227.68/490,906.60
  6. Step 6: Final answer
    x = 380,967.50

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1.5x scale

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.