Home / 2,151.30-2,968.80-1,219.80

Finding the Fourth Proportional to 2,151.30, 2,968.80 and 1,219.80

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Solution

The fourth proportional to 2,151.30, 2,968.80 and 1,219.80 is: 1,683.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.30 : 2,968.80 = 1,219.80 : x
  2. Step 2: Convert to fraction form
    2,151.30/2,968.80 = 1,219.80/x
  3. Step 3: Cross multiply
    2,151.30x = 2,968.80 × 1,219.80
  4. Step 4: Simplify right side
    2,151.30x = 3,621,342.24
  5. Step 5: Solve for x
    x = 3,621,342.24/2,151.30
  6. Step 6: Final answer
    x = 1,683.33

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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.