Home / 2,179.85-3,008.21-1,185.15

Finding the Fourth Proportional to 2,179.85, 3,008.21 and 1,185.15

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Solution

The fourth proportional to 2,179.85, 3,008.21 and 1,185.15 is: 1,635.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.85 : 3,008.21 = 1,185.15 : x
  2. Step 2: Convert to fraction form
    2,179.85/3,008.21 = 1,185.15/x
  3. Step 3: Cross multiply
    2,179.85x = 3,008.21 × 1,185.15
  4. Step 4: Simplify right side
    2,179.85x = 3,565,174.16
  5. Step 5: Solve for x
    x = 3,565,174.16/2,179.85
  6. Step 6: Final answer
    x = 1,635.52

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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.