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Finding the Fourth Proportional to 399,245.52, 550,967.16 and 217,965.09

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Solution

The fourth proportional to 399,245.52, 550,967.16 and 217,965.09 is: 300,796.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,245.52 : 550,967.16 = 217,965.09 : x
  2. Step 2: Convert to fraction form
    399,245.52/550,967.16 = 217,965.09/x
  3. Step 3: Cross multiply
    399,245.52x = 550,967.16 × 217,965.09
  4. Step 4: Simplify right side
    399,245.52x = 120,091,606,616.44
  5. Step 5: Solve for x
    x = 120,091,606,616.44/399,245.52
  6. Step 6: Final answer
    x = 300,796.38

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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.