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Finding the Fourth Proportional to 490,906.61, 677,455.16 and 276,044.80

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Solution

The fourth proportional to 490,906.61, 677,455.16 and 276,044.80 is: 380,944.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,906.61 : 677,455.16 = 276,044.80 : x
  2. Step 2: Convert to fraction form
    490,906.61/677,455.16 = 276,044.80/x
  3. Step 3: Cross multiply
    490,906.61x = 677,455.16 × 276,044.80
  4. Step 4: Simplify right side
    490,906.61x = 187,007,969,383.67
  5. Step 5: Solve for x
    x = 187,007,969,383.67/490,906.61
  6. Step 6: Final answer
    x = 380,944.09

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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.