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Finding the Fourth Proportional to 389,891.90, 538,097.43 and 236,955

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Solution

The fourth proportional to 389,891.90, 538,097.43 and 236,955 is: 327,026.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,891.90 : 538,097.43 = 236,955 : x
  2. Step 2: Convert to fraction form
    389,891.90/538,097.43 = 236,955/x
  3. Step 3: Cross multiply
    389,891.90x = 538,097.43 × 236,955
  4. Step 4: Simplify right side
    389,891.90x = 127,504,876,525.65
  5. Step 5: Solve for x
    x = 127,504,876,525.65/389,891.90
  6. Step 6: Final answer
    x = 327,026.23

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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.