Home / 3,109.76-4,664.64-2,919.68

Finding the Fourth Proportional to 3,109.76, 4,664.64 and 2,919.68

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Solution

The fourth proportional to 3,109.76, 4,664.64 and 2,919.68 is: 4,379.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.76 : 4,664.64 = 2,919.68 : x
  2. Step 2: Convert to fraction form
    3,109.76/4,664.64 = 2,919.68/x
  3. Step 3: Cross multiply
    3,109.76x = 4,664.64 × 2,919.68
  4. Step 4: Simplify right side
    3,109.76x = 13,619,256.12
  5. Step 5: Solve for x
    x = 13,619,256.12/3,109.76
  6. Step 6: Final answer
    x = 4,379.52

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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.