Home / 1,981.72-2,735.58-1,361.08

Finding the Fourth Proportional to 1,981.72, 2,735.58 and 1,361.08

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Solution

The fourth proportional to 1,981.72, 2,735.58 and 1,361.08 is: 1,878.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.72 : 2,735.58 = 1,361.08 : x
  2. Step 2: Convert to fraction form
    1,981.72/2,735.58 = 1,361.08/x
  3. Step 3: Cross multiply
    1,981.72x = 2,735.58 × 1,361.08
  4. Step 4: Simplify right side
    1,981.72x = 3,723,343.23
  5. Step 5: Solve for x
    x = 3,723,343.23/1,981.72
  6. Step 6: Final answer
    x = 1,878.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.