Home / 2,170.66-3,261.33-1,391.00

Finding the Fourth Proportional to 2,170.66, 3,261.33 and 1,391.00

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Solution

The fourth proportional to 2,170.66, 3,261.33 and 1,391.00 is: 2,089.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.66 : 3,261.33 = 1,391.00 : x
  2. Step 2: Convert to fraction form
    2,170.66/3,261.33 = 1,391.00/x
  3. Step 3: Cross multiply
    2,170.66x = 3,261.33 × 1,391.00
  4. Step 4: Simplify right side
    2,170.66x = 4,536,493.72
  5. Step 5: Solve for x
    x = 4,536,493.72/2,170.66
  6. Step 6: Final answer
    x = 2,089.92

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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.