Home / 1,990.21-2,983.47-1,066.39

Finding the Fourth Proportional to 1,990.21, 2,983.47 and 1,066.39

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Solution

The fourth proportional to 1,990.21, 2,983.47 and 1,066.39 is: 1,598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.21 : 2,983.47 = 1,066.39 : x
  2. Step 2: Convert to fraction form
    1,990.21/2,983.47 = 1,066.39/x
  3. Step 3: Cross multiply
    1,990.21x = 2,983.47 × 1,066.39
  4. Step 4: Simplify right side
    1,990.21x = 3,181,542.57
  5. Step 5: Solve for x
    x = 3,181,542.57/1,990.21
  6. Step 6: Final answer
    x = 1,598.60

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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.