Home / 2,119.80-3,179.70-1,026.30

Finding the Fourth Proportional to 2,119.80, 3,179.70 and 1,026.30

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Solution

The fourth proportional to 2,119.80, 3,179.70 and 1,026.30 is: 1,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.80 : 3,179.70 = 1,026.30 : x
  2. Step 2: Convert to fraction form
    2,119.80/3,179.70 = 1,026.30/x
  3. Step 3: Cross multiply
    2,119.80x = 3,179.70 × 1,026.30
  4. Step 4: Simplify right side
    2,119.80x = 3,263,326.11
  5. Step 5: Solve for x
    x = 3,263,326.11/2,119.80
  6. Step 6: Final answer
    x = 1,539.45

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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.