Home / 1,990.21-2,746.47-1,105.99

Finding the Fourth Proportional to 1,990.21, 2,746.47 and 1,105.99

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Solution

The fourth proportional to 1,990.21, 2,746.47 and 1,105.99 is: 1,526.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.21 : 2,746.47 = 1,105.99 : x
  2. Step 2: Convert to fraction form
    1,990.21/2,746.47 = 1,105.99/x
  3. Step 3: Cross multiply
    1,990.21x = 2,746.47 × 1,105.99
  4. Step 4: Simplify right side
    1,990.21x = 3,037,568.36
  5. Step 5: Solve for x
    x = 3,037,568.36/1,990.21
  6. Step 6: Final answer
    x = 1,526.26

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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.