Home / 3,120.21-4,298.36-2,670.65

Finding the Fourth Proportional to 3,120.21, 4,298.36 and 2,670.65

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Solution

The fourth proportional to 3,120.21, 4,298.36 and 2,670.65 is: 3,679.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.21 : 4,298.36 = 2,670.65 : x
  2. Step 2: Convert to fraction form
    3,120.21/4,298.36 = 2,670.65/x
  3. Step 3: Cross multiply
    3,120.21x = 4,298.36 × 2,670.65
  4. Step 4: Simplify right side
    3,120.21x = 11,479,400.32
  5. Step 5: Solve for x
    x = 11,479,400.32/3,120.21
  6. Step 6: Final answer
    x = 3,679.05

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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.