Home / 1,040,090.40-1,560,135.60-872,128.80

Finding the Fourth Proportional to 1,040,090.40, 1,560,135.60 and 872,128.80

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Solution

The fourth proportional to 1,040,090.40, 1,560,135.60 and 872,128.80 is: 1,308,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040,090.40 : 1,560,135.60 = 872,128.80 : x
  2. Step 2: Convert to fraction form
    1,040,090.40/1,560,135.60 = 872,128.80/x
  3. Step 3: Cross multiply
    1,040,090.40x = 1,560,135.60 × 872,128.80
  4. Step 4: Simplify right side
    1,040,090.40x = 1,360,639,188,665.28
  5. Step 5: Solve for x
    x = 1,360,639,188,665.28/1,040,090.40
  6. Step 6: Final answer
    x = 1,308,193.20

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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.