Home / 491,481.20-678,265.80-276,635.12

Finding the Fourth Proportional to 491,481.20, 678,265.80 and 276,635.12

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Solution

The fourth proportional to 491,481.20, 678,265.80 and 276,635.12 is: 381,768.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,481.20 : 678,265.80 = 276,635.12 : x
  2. Step 2: Convert to fraction form
    491,481.20/678,265.80 = 276,635.12/x
  3. Step 3: Cross multiply
    491,481.20x = 678,265.80 × 276,635.12
  4. Step 4: Simplify right side
    491,481.20x = 187,632,140,974.90
  5. Step 5: Solve for x
    x = 187,632,140,974.90/491,481.20
  6. Step 6: Final answer
    x = 381,768.70

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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.