Home / 1,990.95-2,986.15-1,103.13

Finding the Fourth Proportional to 1,990.95, 2,986.15 and 1,103.13

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Solution

The fourth proportional to 1,990.95, 2,986.15 and 1,103.13 is: 1,654.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.95 : 2,986.15 = 1,103.13 : x
  2. Step 2: Convert to fraction form
    1,990.95/2,986.15 = 1,103.13/x
  3. Step 3: Cross multiply
    1,990.95x = 2,986.15 × 1,103.13
  4. Step 4: Simplify right side
    1,990.95x = 3,294,111.65
  5. Step 5: Solve for x
    x = 3,294,111.65/1,990.95
  6. Step 6: Final answer
    x = 1,654.54

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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.