Home / 780,198.14-1,076,369.31-489,640.15

Finding the Fourth Proportional to 780,198.14, 1,076,369.31 and 489,640.15

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Solution

The fourth proportional to 780,198.14, 1,076,369.31 and 489,640.15 is: 675,512.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,198.14 : 1,076,369.31 = 489,640.15 : x
  2. Step 2: Convert to fraction form
    780,198.14/1,076,369.31 = 489,640.15/x
  3. Step 3: Cross multiply
    780,198.14x = 1,076,369.31 × 489,640.15
  4. Step 4: Simplify right side
    780,198.14x = 527,033,630,403.80
  5. Step 5: Solve for x
    x = 527,033,630,403.80/780,198.14
  6. Step 6: Final answer
    x = 675,512.54

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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.