Home / 2,661.40-3,986.70-1,505.80

Finding the Fourth Proportional to 2,661.40, 3,986.70 and 1,505.80

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Solution

The fourth proportional to 2,661.40, 3,986.70 and 1,505.80 is: 2,255.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.40 : 3,986.70 = 1,505.80 : x
  2. Step 2: Convert to fraction form
    2,661.40/3,986.70 = 1,505.80/x
  3. Step 3: Cross multiply
    2,661.40x = 3,986.70 × 1,505.80
  4. Step 4: Simplify right side
    2,661.40x = 6,003,172.86
  5. Step 5: Solve for x
    x = 6,003,172.86/2,661.40
  6. Step 6: Final answer
    x = 2,255.64

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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.