Home / 685,425.09-1,028,352.72-412,185.78

Finding the Fourth Proportional to 685,425.09, 1,028,352.72 and 412,185.78

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Solution

The fourth proportional to 685,425.09, 1,028,352.72 and 412,185.78 is: 618,408.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,425.09 : 1,028,352.72 = 412,185.78 : x
  2. Step 2: Convert to fraction form
    685,425.09/1,028,352.72 = 412,185.78/x
  3. Step 3: Cross multiply
    685,425.09x = 1,028,352.72 × 412,185.78
  4. Step 4: Simplify right side
    685,425.09x = 423,872,368,008.32
  5. Step 5: Solve for x
    x = 423,872,368,008.32/685,425.09
  6. Step 6: Final answer
    x = 618,408.01

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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.