Home / 1,980.33-2,731.97-1,140.81

Finding the Fourth Proportional to 1,980.33, 2,731.97 and 1,140.81

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Solution

The fourth proportional to 1,980.33, 2,731.97 and 1,140.81 is: 1,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.33 : 2,731.97 = 1,140.81 : x
  2. Step 2: Convert to fraction form
    1,980.33/2,731.97 = 1,140.81/x
  3. Step 3: Cross multiply
    1,980.33x = 2,731.97 × 1,140.81
  4. Step 4: Simplify right side
    1,980.33x = 3,116,652.99
  5. Step 5: Solve for x
    x = 3,116,652.99/1,980.33
  6. Step 6: Final answer
    x = 1,573.80

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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.