Home / 1,982.85-2,973.99-1,388.07

Finding the Fourth Proportional to 1,982.85, 2,973.99 and 1,388.07

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Solution

The fourth proportional to 1,982.85, 2,973.99 and 1,388.07 is: 2,081.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.85 : 2,973.99 = 1,388.07 : x
  2. Step 2: Convert to fraction form
    1,982.85/2,973.99 = 1,388.07/x
  3. Step 3: Cross multiply
    1,982.85x = 2,973.99 × 1,388.07
  4. Step 4: Simplify right side
    1,982.85x = 4,128,106.30
  5. Step 5: Solve for x
    x = 4,128,106.30/1,982.85
  6. Step 6: Final answer
    x = 2,081.91

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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.