Home / 3,121.14-4,307.16-1,723.90

Finding the Fourth Proportional to 3,121.14, 4,307.16 and 1,723.90

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Solution

The fourth proportional to 3,121.14, 4,307.16 and 1,723.90 is: 2,378.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.14 : 4,307.16 = 1,723.90 : x
  2. Step 2: Convert to fraction form
    3,121.14/4,307.16 = 1,723.90/x
  3. Step 3: Cross multiply
    3,121.14x = 4,307.16 × 1,723.90
  4. Step 4: Simplify right side
    3,121.14x = 7,425,113.12
  5. Step 5: Solve for x
    x = 7,425,113.12/3,121.14
  6. Step 6: Final answer
    x = 2,378.97

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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.