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Finding the Fourth Proportional to 3,393.78, 5,090.60 and 1,661.19

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Solution

The fourth proportional to 3,393.78, 5,090.60 and 1,661.19 is: 2,491.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,393.78 : 5,090.60 = 1,661.19 : x
  2. Step 2: Convert to fraction form
    3,393.78/5,090.60 = 1,661.19/x
  3. Step 3: Cross multiply
    3,393.78x = 5,090.60 × 1,661.19
  4. Step 4: Simplify right side
    3,393.78x = 8,456,445.51
  5. Step 5: Solve for x
    x = 8,456,445.51/3,393.78
  6. Step 6: Final answer
    x = 2,491.75

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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.