Home / 1,571.80-2,169.09-982.67

Finding the Fourth Proportional to 1,571.80, 2,169.09 and 982.67

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Solution

The fourth proportional to 1,571.80, 2,169.09 and 982.67 is: 1,356.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.80 : 2,169.09 = 982.67 : x
  2. Step 2: Convert to fraction form
    1,571.80/2,169.09 = 982.67/x
  3. Step 3: Cross multiply
    1,571.80x = 2,169.09 × 982.67
  4. Step 4: Simplify right side
    1,571.80x = 2,131,499.67
  5. Step 5: Solve for x
    x = 2,131,499.67/1,571.80
  6. Step 6: Final answer
    x = 1,356.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.