Home / 1,920.21-2,649.81-1,080.96

Finding the Fourth Proportional to 1,920.21, 2,649.81 and 1,080.96

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Solution

The fourth proportional to 1,920.21, 2,649.81 and 1,080.96 is: 1,491.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.21 : 2,649.81 = 1,080.96 : x
  2. Step 2: Convert to fraction form
    1,920.21/2,649.81 = 1,080.96/x
  3. Step 3: Cross multiply
    1,920.21x = 2,649.81 × 1,080.96
  4. Step 4: Simplify right side
    1,920.21x = 2,864,338.62
  5. Step 5: Solve for x
    x = 2,864,338.62/1,920.21
  6. Step 6: Final answer
    x = 1,491.68

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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.