Home / 1,317.97-1,977.01-668.55

Finding the Fourth Proportional to 1,317.97, 1,977.01 and 668.55

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Solution

The fourth proportional to 1,317.97, 1,977.01 and 668.55 is: 1,002.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.97 : 1,977.01 = 668.55 : x
  2. Step 2: Convert to fraction form
    1,317.97/1,977.01 = 668.55/x
  3. Step 3: Cross multiply
    1,317.97x = 1,977.01 × 668.55
  4. Step 4: Simplify right side
    1,317.97x = 1,321,735.78
  5. Step 5: Solve for x
    x = 1,321,735.78/1,317.97
  6. Step 6: Final answer
    x = 1,002.86

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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.