Home / 685,499.92-1,028,293.44-212,145.52

Finding the Fourth Proportional to 685,499.92, 1,028,293.44 and 212,145.52

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Solution

The fourth proportional to 685,499.92, 1,028,293.44 and 212,145.52 is: 318,231.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,499.92 : 1,028,293.44 = 212,145.52 : x
  2. Step 2: Convert to fraction form
    685,499.92/1,028,293.44 = 212,145.52/x
  3. Step 3: Cross multiply
    685,499.92x = 1,028,293.44 × 212,145.52
  4. Step 4: Simplify right side
    685,499.92x = 218,147,846,541.39
  5. Step 5: Solve for x
    x = 218,147,846,541.39/685,499.92
  6. Step 6: Final answer
    x = 318,231.76

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1.5x scale

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.