Home / 1,989.51-2,984.40-1,112.01

Finding the Fourth Proportional to 1,989.51, 2,984.40 and 1,112.01

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Solution

The fourth proportional to 1,989.51, 2,984.40 and 1,112.01 is: 1,668.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.51 : 2,984.40 = 1,112.01 : x
  2. Step 2: Convert to fraction form
    1,989.51/2,984.40 = 1,112.01/x
  3. Step 3: Cross multiply
    1,989.51x = 2,984.40 × 1,112.01
  4. Step 4: Simplify right side
    1,989.51x = 3,318,682.64
  5. Step 5: Solve for x
    x = 3,318,682.64/1,989.51
  6. Step 6: Final answer
    x = 1,668.09

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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.