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Finding the Fourth Proportional to 449,139.78, 619,803.63 and 245,194.74

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Solution

The fourth proportional to 449,139.78, 619,803.63 and 245,194.74 is: 338,363.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,139.78 : 619,803.63 = 245,194.74 : x
  2. Step 2: Convert to fraction form
    449,139.78/619,803.63 = 245,194.74/x
  3. Step 3: Cross multiply
    449,139.78x = 619,803.63 × 245,194.74
  4. Step 4: Simplify right side
    449,139.78x = 151,972,589,908.91
  5. Step 5: Solve for x
    x = 151,972,589,908.91/449,139.78
  6. Step 6: Final answer
    x = 338,363.68

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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.