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Finding the Fourth Proportional to 491,452.43, 678,131.21 and 276,579.68

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Solution

The fourth proportional to 491,452.43, 678,131.21 and 276,579.68 is: 381,638.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,452.43 : 678,131.21 = 276,579.68 : x
  2. Step 2: Convert to fraction form
    491,452.43/678,131.21 = 276,579.68/x
  3. Step 3: Cross multiply
    491,452.43x = 678,131.21 × 276,579.68
  4. Step 4: Simplify right side
    491,452.43x = 187,557,311,676.91
  5. Step 5: Solve for x
    x = 187,557,311,676.91/491,452.43
  6. Step 6: Final answer
    x = 381,638.79

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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.