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Finding the Fourth Proportional to 2,668.77, 4,002.57 and 720.54

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Solution

The fourth proportional to 2,668.77, 4,002.57 and 720.54 is: 1,080.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.77 : 4,002.57 = 720.54 : x
  2. Step 2: Convert to fraction form
    2,668.77/4,002.57 = 720.54/x
  3. Step 3: Cross multiply
    2,668.77x = 4,002.57 × 720.54
  4. Step 4: Simplify right side
    2,668.77x = 2,884,011.79
  5. Step 5: Solve for x
    x = 2,884,011.79/2,668.77
  6. Step 6: Final answer
    x = 1,080.65

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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.