Home / 1,107,907.20-1,661,860.80-685,814.40

Finding the Fourth Proportional to 1,107,907.20, 1,661,860.80 and 685,814.40

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Solution

The fourth proportional to 1,107,907.20, 1,661,860.80 and 685,814.40 is: 1,028,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107,907.20 : 1,661,860.80 = 685,814.40 : x
  2. Step 2: Convert to fraction form
    1,107,907.20/1,661,860.80 = 685,814.40/x
  3. Step 3: Cross multiply
    1,107,907.20x = 1,661,860.80 × 685,814.40
  4. Step 4: Simplify right side
    1,107,907.20x = 1,139,728,067,435.52
  5. Step 5: Solve for x
    x = 1,139,728,067,435.52/1,107,907.20
  6. Step 6: Final answer
    x = 1,028,721.60

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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.