Home / 3,987.36-5,982.40-1,214.08

Finding the Fourth Proportional to 3,987.36, 5,982.40 and 1,214.08

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Solution

The fourth proportional to 3,987.36, 5,982.40 and 1,214.08 is: 1,821.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.36 : 5,982.40 = 1,214.08 : x
  2. Step 2: Convert to fraction form
    3,987.36/5,982.40 = 1,214.08/x
  3. Step 3: Cross multiply
    3,987.36x = 5,982.40 × 1,214.08
  4. Step 4: Simplify right side
    3,987.36x = 7,263,112.19
  5. Step 5: Solve for x
    x = 7,263,112.19/3,987.36
  6. Step 6: Final answer
    x = 1,821.53

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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.