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Finding the Fourth Proportional to 1,958.83, 2,936.40 and 659.39

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Solution

The fourth proportional to 1,958.83, 2,936.40 and 659.39 is: 988.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.83 : 2,936.40 = 659.39 : x
  2. Step 2: Convert to fraction form
    1,958.83/2,936.40 = 659.39/x
  3. Step 3: Cross multiply
    1,958.83x = 2,936.40 × 659.39
  4. Step 4: Simplify right side
    1,958.83x = 1,936,235.87
  5. Step 5: Solve for x
    x = 1,936,235.87/1,958.83
  6. Step 6: Final answer
    x = 988.46

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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.