Home / 644,940.44-889,979.56-358,450.72

Finding the Fourth Proportional to 644,940.44, 889,979.56 and 358,450.72

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Solution

The fourth proportional to 644,940.44, 889,979.56 and 358,450.72 is: 494,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,940.44 : 889,979.56 = 358,450.72 : x
  2. Step 2: Convert to fraction form
    644,940.44/889,979.56 = 358,450.72/x
  3. Step 3: Cross multiply
    644,940.44x = 889,979.56 × 358,450.72
  4. Step 4: Simplify right side
    644,940.44x = 319,013,814,067.28
  5. Step 5: Solve for x
    x = 319,013,814,067.28/644,940.44
  6. Step 6: Final answer
    x = 494,640.74

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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.