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Finding the Fourth Proportional to 449,039.95, 619,675.14 and 306,049.79

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Solution

The fourth proportional to 449,039.95, 619,675.14 and 306,049.79 is: 422,348.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,039.95 : 619,675.14 = 306,049.79 : x
  2. Step 2: Convert to fraction form
    449,039.95/619,675.14 = 306,049.79/x
  3. Step 3: Cross multiply
    449,039.95x = 619,675.14 × 306,049.79
  4. Step 4: Simplify right side
    449,039.95x = 189,651,446,579.80
  5. Step 5: Solve for x
    x = 189,651,446,579.80/449,039.95
  6. Step 6: Final answer
    x = 422,348.71

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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.