Home / 439,976.80-607,176.56-287,112.78

Finding the Fourth Proportional to 439,976.80, 607,176.56 and 287,112.78

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Solution

The fourth proportional to 439,976.80, 607,176.56 and 287,112.78 is: 396,221.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,976.80 : 607,176.56 = 287,112.78 : x
  2. Step 2: Convert to fraction form
    439,976.80/607,176.56 = 287,112.78/x
  3. Step 3: Cross multiply
    439,976.80x = 607,176.56 × 287,112.78
  4. Step 4: Simplify right side
    439,976.80x = 174,328,150,092.44
  5. Step 5: Solve for x
    x = 174,328,150,092.44/439,976.80
  6. Step 6: Final answer
    x = 396,221.23

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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.