Home / 1,389,435.30-2,083,168.80-631,639.80

Finding the Fourth Proportional to 1,389,435.30, 2,083,168.80 and 631,639.80

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Solution

The fourth proportional to 1,389,435.30, 2,083,168.80 and 631,639.80 is: 947,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,435.30 : 2,083,168.80 = 631,639.80 : x
  2. Step 2: Convert to fraction form
    1,389,435.30/2,083,168.80 = 631,639.80/x
  3. Step 3: Cross multiply
    1,389,435.30x = 2,083,168.80 × 631,639.80
  4. Step 4: Simplify right side
    1,389,435.30x = 1,315,812,324,198.24
  5. Step 5: Solve for x
    x = 1,315,812,324,198.24/1,389,435.30
  6. Step 6: Final answer
    x = 947,012.30

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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.