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Finding the Fourth Proportional to 689,893.38, 952,067.44 and 388,087.38

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Solution

The fourth proportional to 689,893.38, 952,067.44 and 388,087.38 is: 535,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,893.38 : 952,067.44 = 388,087.38 : x
  2. Step 2: Convert to fraction form
    689,893.38/952,067.44 = 388,087.38/x
  3. Step 3: Cross multiply
    689,893.38x = 952,067.44 × 388,087.38
  4. Step 4: Simplify right side
    689,893.38x = 369,485,358,372.91
  5. Step 5: Solve for x
    x = 369,485,358,372.91/689,893.38
  6. Step 6: Final answer
    x = 535,568.78

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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.