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Finding the Fourth Proportional to 1,960.36, 2,939.67 and 920.66

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Solution

The fourth proportional to 1,960.36, 2,939.67 and 920.66 is: 1,380.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.36 : 2,939.67 = 920.66 : x
  2. Step 2: Convert to fraction form
    1,960.36/2,939.67 = 920.66/x
  3. Step 3: Cross multiply
    1,960.36x = 2,939.67 × 920.66
  4. Step 4: Simplify right side
    1,960.36x = 2,706,425.34
  5. Step 5: Solve for x
    x = 2,706,425.34/1,960.36
  6. Step 6: Final answer
    x = 1,380.58

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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.