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Finding the Fourth Proportional to 399,244.52, 550,965.78 and 217,964.09

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Solution

The fourth proportional to 399,244.52, 550,965.78 and 217,964.09 is: 300,795.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,244.52 : 550,965.78 = 217,964.09 : x
  2. Step 2: Convert to fraction form
    399,244.52/550,965.78 = 217,964.09/x
  3. Step 3: Cross multiply
    399,244.52x = 550,965.78 × 217,964.09
  4. Step 4: Simplify right side
    399,244.52x = 120,090,754,858.84
  5. Step 5: Solve for x
    x = 120,090,754,858.84/399,244.52
  6. Step 6: Final answer
    x = 300,795.00

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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.