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Finding the Fourth Proportional to 640,838.54, 961,468.25 and 262,077.82

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Solution

The fourth proportional to 640,838.54, 961,468.25 and 262,077.82 is: 393,202.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,838.54 : 961,468.25 = 262,077.82 : x
  2. Step 2: Convert to fraction form
    640,838.54/961,468.25 = 262,077.82/x
  3. Step 3: Cross multiply
    640,838.54x = 961,468.25 × 262,077.82
  4. Step 4: Simplify right side
    640,838.54x = 251,979,501,456.44
  5. Step 5: Solve for x
    x = 251,979,501,456.44/640,838.54
  6. Step 6: Final answer
    x = 393,202.79

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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.