Home / 1,449.30-2,172.21-668.23

Finding the Fourth Proportional to 1,449.30, 2,172.21 and 668.23

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Solution

The fourth proportional to 1,449.30, 2,172.21 and 668.23 is: 1,001.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.30 : 2,172.21 = 668.23 : x
  2. Step 2: Convert to fraction form
    1,449.30/2,172.21 = 668.23/x
  3. Step 3: Cross multiply
    1,449.30x = 2,172.21 × 668.23
  4. Step 4: Simplify right side
    1,449.30x = 1,451,521.69
  5. Step 5: Solve for x
    x = 1,451,521.69/1,449.30
  6. Step 6: Final answer
    x = 1,001.54

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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.