Home / 685,728.87-1,028,660.94-236,390.63

Finding the Fourth Proportional to 685,728.87, 1,028,660.94 and 236,390.63

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Solution

The fourth proportional to 685,728.87, 1,028,660.94 and 236,390.63 is: 354,609.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,728.87 : 1,028,660.94 = 236,390.63 : x
  2. Step 2: Convert to fraction form
    685,728.87/1,028,660.94 = 236,390.63/x
  3. Step 3: Cross multiply
    685,728.87x = 1,028,660.94 × 236,390.63
  4. Step 4: Simplify right side
    685,728.87x = 243,165,802,519.69
  5. Step 5: Solve for x
    x = 243,165,802,519.69/685,728.87
  6. Step 6: Final answer
    x = 354,609.25

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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.