Home / 2,185.35-3,015.79-1,190.65

Finding the Fourth Proportional to 2,185.35, 3,015.79 and 1,190.65

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Solution

The fourth proportional to 2,185.35, 3,015.79 and 1,190.65 is: 1,643.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.35 : 3,015.79 = 1,190.65 : x
  2. Step 2: Convert to fraction form
    2,185.35/3,015.79 = 1,190.65/x
  3. Step 3: Cross multiply
    2,185.35x = 3,015.79 × 1,190.65
  4. Step 4: Simplify right side
    2,185.35x = 3,590,753.34
  5. Step 5: Solve for x
    x = 3,590,753.34/2,185.35
  6. Step 6: Final answer
    x = 1,643.11

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1.5x scale

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.