Home / 3,121.16-4,307.20-1,723.91

Finding the Fourth Proportional to 3,121.16, 4,307.20 and 1,723.91

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Solution

The fourth proportional to 3,121.16, 4,307.20 and 1,723.91 is: 2,378.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.16 : 4,307.20 = 1,723.91 : x
  2. Step 2: Convert to fraction form
    3,121.16/4,307.20 = 1,723.91/x
  3. Step 3: Cross multiply
    3,121.16x = 4,307.20 × 1,723.91
  4. Step 4: Simplify right side
    3,121.16x = 7,425,216.53
  5. Step 5: Solve for x
    x = 7,425,216.53/3,121.16
  6. Step 6: Final answer
    x = 2,378.99

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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.