Home / 1,115,121.68-1,538,873.92-685,682.40

Finding the Fourth Proportional to 1,115,121.68, 1,538,873.92 and 685,682.40

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Solution

The fourth proportional to 1,115,121.68, 1,538,873.92 and 685,682.40 is: 946,245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115,121.68 : 1,538,873.92 = 685,682.40 : x
  2. Step 2: Convert to fraction form
    1,115,121.68/1,538,873.92 = 685,682.40/x
  3. Step 3: Cross multiply
    1,115,121.68x = 1,538,873.92 × 685,682.40
  4. Step 4: Simplify right side
    1,115,121.68x = 1,055,178,762,763.01
  5. Step 5: Solve for x
    x = 1,055,178,762,763.01/1,115,121.68
  6. Step 6: Final answer
    x = 946,245.40

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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.