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Finding the Fourth Proportional to 3,608.36, 5,407.80 and 1,851.87

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Solution

The fourth proportional to 3,608.36, 5,407.80 and 1,851.87 is: 2,775.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.36 : 5,407.80 = 1,851.87 : x
  2. Step 2: Convert to fraction form
    3,608.36/5,407.80 = 1,851.87/x
  3. Step 3: Cross multiply
    3,608.36x = 5,407.80 × 1,851.87
  4. Step 4: Simplify right side
    3,608.36x = 10,014,542.59
  5. Step 5: Solve for x
    x = 10,014,542.59/3,608.36
  6. Step 6: Final answer
    x = 2,775.38

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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.