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Finding the Fourth Proportional to 427,067.60, 640,601.40 and 269,992.40

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Solution

The fourth proportional to 427,067.60, 640,601.40 and 269,992.40 is: 404,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,067.60 : 640,601.40 = 269,992.40 : x
  2. Step 2: Convert to fraction form
    427,067.60/640,601.40 = 269,992.40/x
  3. Step 3: Cross multiply
    427,067.60x = 640,601.40 × 269,992.40
  4. Step 4: Simplify right side
    427,067.60x = 172,957,509,429.36
  5. Step 5: Solve for x
    x = 172,957,509,429.36/427,067.60
  6. Step 6: Final answer
    x = 404,988.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.