Home / 1,327.14-1,990.12-668.60

Finding the Fourth Proportional to 1,327.14, 1,990.12 and 668.60

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Solution

The fourth proportional to 1,327.14, 1,990.12 and 668.60 is: 1,002.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.14 : 1,990.12 = 668.60 : x
  2. Step 2: Convert to fraction form
    1,327.14/1,990.12 = 668.60/x
  3. Step 3: Cross multiply
    1,327.14x = 1,990.12 × 668.60
  4. Step 4: Simplify right side
    1,327.14x = 1,330,584.28
  5. Step 5: Solve for x
    x = 1,330,584.28/1,327.14
  6. Step 6: Final answer
    x = 1,002.60

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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.