Home / 2,140.66-3,218.31-1,980.34

Finding the Fourth Proportional to 2,140.66, 3,218.31 and 1,980.34

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Solution

The fourth proportional to 2,140.66, 3,218.31 and 1,980.34 is: 2,977.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.66 : 3,218.31 = 1,980.34 : x
  2. Step 2: Convert to fraction form
    2,140.66/3,218.31 = 1,980.34/x
  3. Step 3: Cross multiply
    2,140.66x = 3,218.31 × 1,980.34
  4. Step 4: Simplify right side
    2,140.66x = 6,373,348.03
  5. Step 5: Solve for x
    x = 6,373,348.03/2,140.66
  6. Step 6: Final answer
    x = 2,977.28

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1.5x scale

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.