Home / 2,115.75-3,173.57-945.45

Finding the Fourth Proportional to 2,115.75, 3,173.57 and 945.45

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Solution

The fourth proportional to 2,115.75, 3,173.57 and 945.45 is: 1,418.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.75 : 3,173.57 = 945.45 : x
  2. Step 2: Convert to fraction form
    2,115.75/3,173.57 = 945.45/x
  3. Step 3: Cross multiply
    2,115.75x = 3,173.57 × 945.45
  4. Step 4: Simplify right side
    2,115.75x = 3,000,447.03
  5. Step 5: Solve for x
    x = 3,000,447.03/2,115.75
  6. Step 6: Final answer
    x = 1,418.15

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1.5x scale

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.