Home / 1,571.68-2,168.93-982.55

Finding the Fourth Proportional to 1,571.68, 2,168.93 and 982.55

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Solution

The fourth proportional to 1,571.68, 2,168.93 and 982.55 is: 1,355.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.68 : 2,168.93 = 982.55 : x
  2. Step 2: Convert to fraction form
    1,571.68/2,168.93 = 982.55/x
  3. Step 3: Cross multiply
    1,571.68x = 2,168.93 × 982.55
  4. Step 4: Simplify right side
    1,571.68x = 2,131,082.68
  5. Step 5: Solve for x
    x = 2,131,082.68/1,571.68
  6. Step 6: Final answer
    x = 1,355.93

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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.