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Finding the Fourth Proportional to 399,245.44, 550,967.05 and 217,965.01

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Solution

The fourth proportional to 399,245.44, 550,967.05 and 217,965.01 is: 300,796.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,245.44 : 550,967.05 = 217,965.01 : x
  2. Step 2: Convert to fraction form
    399,245.44/550,967.05 = 217,965.01/x
  3. Step 3: Cross multiply
    399,245.44x = 550,967.05 × 217,965.01
  4. Step 4: Simplify right side
    399,245.44x = 120,091,538,562.92
  5. Step 5: Solve for x
    x = 120,091,538,562.92/399,245.44
  6. Step 6: Final answer
    x = 300,796.27

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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.