Home / 1,449.29-2,172.74-669.12

Finding the Fourth Proportional to 1,449.29, 2,172.74 and 669.12

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Solution

The fourth proportional to 1,449.29, 2,172.74 and 669.12 is: 1,003.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.29 : 2,172.74 = 669.12 : x
  2. Step 2: Convert to fraction form
    1,449.29/2,172.74 = 669.12/x
  3. Step 3: Cross multiply
    1,449.29x = 2,172.74 × 669.12
  4. Step 4: Simplify right side
    1,449.29x = 1,453,820.44
  5. Step 5: Solve for x
    x = 1,453,820.44/1,449.29
  6. Step 6: Final answer
    x = 1,003.13

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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.