Home / 2,668.24-4,002.36-720.40

Finding the Fourth Proportional to 2,668.24, 4,002.36 and 720.40

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Solution

The fourth proportional to 2,668.24, 4,002.36 and 720.40 is: 1,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.24 : 4,002.36 = 720.40 : x
  2. Step 2: Convert to fraction form
    2,668.24/4,002.36 = 720.40/x
  3. Step 3: Cross multiply
    2,668.24x = 4,002.36 × 720.40
  4. Step 4: Simplify right side
    2,668.24x = 2,883,300.14
  5. Step 5: Solve for x
    x = 2,883,300.14/2,668.24
  6. Step 6: Final answer
    x = 1,080.60

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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.