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Finding the Fourth Proportional to 404,067.28, 557,678.52 and 243,085

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Solution

The fourth proportional to 404,067.28, 557,678.52 and 243,085 is: 335,496.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,067.28 : 557,678.52 = 243,085 : x
  2. Step 2: Convert to fraction form
    404,067.28/557,678.52 = 243,085/x
  3. Step 3: Cross multiply
    404,067.28x = 557,678.52 × 243,085
  4. Step 4: Simplify right side
    404,067.28x = 135,563,283,034.20
  5. Step 5: Solve for x
    x = 135,563,283,034.20/404,067.28
  6. Step 6: Final answer
    x = 335,496.81

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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.