Home / 2,670.19-4,004.91-820.79

Finding the Fourth Proportional to 2,670.19, 4,004.91 and 820.79

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Solution

The fourth proportional to 2,670.19, 4,004.91 and 820.79 is: 1,231.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670.19 : 4,004.91 = 820.79 : x
  2. Step 2: Convert to fraction form
    2,670.19/4,004.91 = 820.79/x
  3. Step 3: Cross multiply
    2,670.19x = 4,004.91 × 820.79
  4. Step 4: Simplify right side
    2,670.19x = 3,287,190.08
  5. Step 5: Solve for x
    x = 3,287,190.08/2,670.19
  6. Step 6: Final answer
    x = 1,231.07

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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.