Home / 1,990.40-2,984.68-1,100.33

Finding the Fourth Proportional to 1,990.40, 2,984.68 and 1,100.33

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Solution

The fourth proportional to 1,990.40, 2,984.68 and 1,100.33 is: 1,649.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.40 : 2,984.68 = 1,100.33 : x
  2. Step 2: Convert to fraction form
    1,990.40/2,984.68 = 1,100.33/x
  3. Step 3: Cross multiply
    1,990.40x = 2,984.68 × 1,100.33
  4. Step 4: Simplify right side
    1,990.40x = 3,284,126.46
  5. Step 5: Solve for x
    x = 3,284,126.46/1,990.40
  6. Step 6: Final answer
    x = 1,649.99

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1.5x scale

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.