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Finding the Fourth Proportional to 491,172.56, 677,857.48 and 276,299.80

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Solution

The fourth proportional to 491,172.56, 677,857.48 and 276,299.80 is: 381,315.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,172.56 : 677,857.48 = 276,299.80 : x
  2. Step 2: Convert to fraction form
    491,172.56/677,857.48 = 276,299.80/x
  3. Step 3: Cross multiply
    491,172.56x = 677,857.48 × 276,299.80
  4. Step 4: Simplify right side
    491,172.56x = 187,291,886,152.50
  5. Step 5: Solve for x
    x = 187,291,886,152.50/491,172.56
  6. Step 6: Final answer
    x = 381,315.86

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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.