Home / 2,618,859.40-3,928,455.13-821,813.80

Finding the Fourth Proportional to 2,618,859.40, 3,928,455.13 and 821,813.80

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Solution

The fourth proportional to 2,618,859.40, 3,928,455.13 and 821,813.80 is: 1,232,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618,859.40 : 3,928,455.13 = 821,813.80 : x
  2. Step 2: Convert to fraction form
    2,618,859.40/3,928,455.13 = 821,813.80/x
  3. Step 3: Cross multiply
    2,618,859.40x = 3,928,455.13 × 821,813.80
  4. Step 4: Simplify right side
    2,618,859.40x = 3,228,458,628,693.66
  5. Step 5: Solve for x
    x = 3,228,458,628,693.66/2,618,859.40
  6. Step 6: Final answer
    x = 1,232,772.80

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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.