Home / 1,990.75-2,986.98-1,066.06

Finding the Fourth Proportional to 1,990.75, 2,986.98 and 1,066.06

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Solution

The fourth proportional to 1,990.75, 2,986.98 and 1,066.06 is: 1,599.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.75 : 2,986.98 = 1,066.06 : x
  2. Step 2: Convert to fraction form
    1,990.75/2,986.98 = 1,066.06/x
  3. Step 3: Cross multiply
    1,990.75x = 2,986.98 × 1,066.06
  4. Step 4: Simplify right side
    1,990.75x = 3,184,299.90
  5. Step 5: Solve for x
    x = 3,184,299.90/1,990.75
  6. Step 6: Final answer
    x = 1,599.55

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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.