Home / 1,388,971.20-1,916,771.04-785,361.60

Finding the Fourth Proportional to 1,388,971.20, 1,916,771.04 and 785,361.60

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Solution

The fourth proportional to 1,388,971.20, 1,916,771.04 and 785,361.60 is: 1,083,793.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,971.20 : 1,916,771.04 = 785,361.60 : x
  2. Step 2: Convert to fraction form
    1,388,971.20/1,916,771.04 = 785,361.60/x
  3. Step 3: Cross multiply
    1,388,971.20x = 1,916,771.04 × 785,361.60
  4. Step 4: Simplify right side
    1,388,971.20x = 1,505,358,370,808.06
  5. Step 5: Solve for x
    x = 1,505,358,370,808.06/1,388,971.20
  6. Step 6: Final answer
    x = 1,083,793.80

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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.