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Finding the Fourth Proportional to 3,561.73, 5,343.81 and 1,918.44

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Solution

The fourth proportional to 3,561.73, 5,343.81 and 1,918.44 is: 2,878.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.73 : 5,343.81 = 1,918.44 : x
  2. Step 2: Convert to fraction form
    3,561.73/5,343.81 = 1,918.44/x
  3. Step 3: Cross multiply
    3,561.73x = 5,343.81 × 1,918.44
  4. Step 4: Simplify right side
    3,561.73x = 10,251,792.22
  5. Step 5: Solve for x
    x = 10,251,792.22/3,561.73
  6. Step 6: Final answer
    x = 2,878.32

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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.