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Finding the Fourth Proportional to 1,192.21, 1,645.14 and 668.14

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Solution

The fourth proportional to 1,192.21, 1,645.14 and 668.14 is: 921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.21 : 1,645.14 = 668.14 : x
  2. Step 2: Convert to fraction form
    1,192.21/1,645.14 = 668.14/x
  3. Step 3: Cross multiply
    1,192.21x = 1,645.14 × 668.14
  4. Step 4: Simplify right side
    1,192.21x = 1,099,183.84
  5. Step 5: Solve for x
    x = 1,099,183.84/1,192.21
  6. Step 6: Final answer
    x = 921.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.