Home / 2,180.40-3,008.88-1,185.65

Finding the Fourth Proportional to 2,180.40, 3,008.88 and 1,185.65

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Solution

The fourth proportional to 2,180.40, 3,008.88 and 1,185.65 is: 1,636.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180.40 : 3,008.88 = 1,185.65 : x
  2. Step 2: Convert to fraction form
    2,180.40/3,008.88 = 1,185.65/x
  3. Step 3: Cross multiply
    2,180.40x = 3,008.88 × 1,185.65
  4. Step 4: Simplify right side
    2,180.40x = 3,567,474.81
  5. Step 5: Solve for x
    x = 3,567,474.81/2,180.40
  6. Step 6: Final answer
    x = 1,636.16

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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.