Home / 2,720.13-4,080.19-668.13

Finding the Fourth Proportional to 2,720.13, 4,080.19 and 668.13

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Solution

The fourth proportional to 2,720.13, 4,080.19 and 668.13 is: 1,002.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.13 : 4,080.19 = 668.13 : x
  2. Step 2: Convert to fraction form
    2,720.13/4,080.19 = 668.13/x
  3. Step 3: Cross multiply
    2,720.13x = 4,080.19 × 668.13
  4. Step 4: Simplify right side
    2,720.13x = 2,726,097.34
  5. Step 5: Solve for x
    x = 2,726,097.34/2,720.13
  6. Step 6: Final answer
    x = 1,002.19

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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.