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Finding the Fourth Proportional to 2,149.47, 3,224.14 and 668.68

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Solution

The fourth proportional to 2,149.47, 3,224.14 and 668.68 is: 1,003.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.47 : 3,224.14 = 668.68 : x
  2. Step 2: Convert to fraction form
    2,149.47/3,224.14 = 668.68/x
  3. Step 3: Cross multiply
    2,149.47x = 3,224.14 × 668.68
  4. Step 4: Simplify right side
    2,149.47x = 2,155,917.94
  5. Step 5: Solve for x
    x = 2,155,917.94/2,149.47
  6. Step 6: Final answer
    x = 1,003.00

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1.5x scale

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.