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Finding the Fourth Proportional to 1,996.05, 2,993.43 and 661.60

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Solution

The fourth proportional to 1,996.05, 2,993.43 and 661.60 is: 992.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,996.05 : 2,993.43 = 661.60 : x
  2. Step 2: Convert to fraction form
    1,996.05/2,993.43 = 661.60/x
  3. Step 3: Cross multiply
    1,996.05x = 2,993.43 × 661.60
  4. Step 4: Simplify right side
    1,996.05x = 1,980,438.32
  5. Step 5: Solve for x
    x = 1,980,438.32/1,996.05
  6. Step 6: Final answer
    x = 992.18

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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.