Home / 1,359,969.90-2,039,371.65-685,790.70

Finding the Fourth Proportional to 1,359,969.90, 2,039,371.65 and 685,790.70

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Solution

The fourth proportional to 1,359,969.90, 2,039,371.65 and 685,790.70 is: 1,028,391.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359,969.90 : 2,039,371.65 = 685,790.70 : x
  2. Step 2: Convert to fraction form
    1,359,969.90/2,039,371.65 = 685,790.70/x
  3. Step 3: Cross multiply
    1,359,969.90x = 2,039,371.65 × 685,790.70
  4. Step 4: Simplify right side
    1,359,969.90x = 1,398,582,111,413.65
  5. Step 5: Solve for x
    x = 1,398,582,111,413.65/1,359,969.90
  6. Step 6: Final answer
    x = 1,028,391.96

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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.