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Finding the Fourth Proportional to 640,296.28, 960,702.81 and 285,067.54

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Solution

The fourth proportional to 640,296.28, 960,702.81 and 285,067.54 is: 427,716.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,296.28 : 960,702.81 = 285,067.54 : x
  2. Step 2: Convert to fraction form
    640,296.28/960,702.81 = 285,067.54/x
  3. Step 3: Cross multiply
    640,296.28x = 960,702.81 × 285,067.54
  4. Step 4: Simplify right side
    640,296.28x = 273,865,186,717.79
  5. Step 5: Solve for x
    x = 273,865,186,717.79/640,296.28
  6. Step 6: Final answer
    x = 427,716.35

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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.