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Finding the Fourth Proportional to 1,192.39, 1,645.52 and 668.42

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Solution

The fourth proportional to 1,192.39, 1,645.52 and 668.42 is: 922.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.39 : 1,645.52 = 668.42 : x
  2. Step 2: Convert to fraction form
    1,192.39/1,645.52 = 668.42/x
  3. Step 3: Cross multiply
    1,192.39x = 1,645.52 × 668.42
  4. Step 4: Simplify right side
    1,192.39x = 1,099,898.48
  5. Step 5: Solve for x
    x = 1,099,898.48/1,192.39
  6. Step 6: Final answer
    x = 922.43

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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.