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Finding the Fourth Proportional to 640,490.97, 960,753.37 and 280,476.60

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Solution

The fourth proportional to 640,490.97, 960,753.37 and 280,476.60 is: 420,722.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,490.97 : 960,753.37 = 280,476.60 : x
  2. Step 2: Convert to fraction form
    640,490.97/960,753.37 = 280,476.60/x
  3. Step 3: Cross multiply
    640,490.97x = 960,753.37 × 280,476.60
  4. Step 4: Simplify right side
    640,490.97x = 269,468,838,171.77
  5. Step 5: Solve for x
    x = 269,468,838,171.77/640,490.97
  6. Step 6: Final answer
    x = 420,722.31

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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.