Home / 685,426.59-1,028,354.97-412,187.28

Finding the Fourth Proportional to 685,426.59, 1,028,354.97 and 412,187.28

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Solution

The fourth proportional to 685,426.59, 1,028,354.97 and 412,187.28 is: 618,410.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,426.59 : 1,028,354.97 = 412,187.28 : x
  2. Step 2: Convert to fraction form
    685,426.59/1,028,354.97 = 412,187.28/x
  3. Step 3: Cross multiply
    685,426.59x = 1,028,354.97 × 412,187.28
  4. Step 4: Simplify right side
    685,426.59x = 423,874,837,958.78
  5. Step 5: Solve for x
    x = 423,874,837,958.78/685,426.59
  6. Step 6: Final answer
    x = 618,410.26

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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.