Home / 780,240.95-1,076,428.41-489,682.97

Finding the Fourth Proportional to 780,240.95, 1,076,428.41 and 489,682.97

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Solution

The fourth proportional to 780,240.95, 1,076,428.41 and 489,682.97 is: 675,571.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,240.95 : 1,076,428.41 = 489,682.97 : x
  2. Step 2: Convert to fraction form
    780,240.95/1,076,428.41 = 489,682.97/x
  3. Step 3: Cross multiply
    780,240.95x = 1,076,428.41 × 489,682.97
  4. Step 4: Simplify right side
    780,240.95x = 527,108,661,751.03
  5. Step 5: Solve for x
    x = 527,108,661,751.03/780,240.95
  6. Step 6: Final answer
    x = 675,571.64

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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.