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Finding the Fourth Proportional to 1,958.07, 2,936.97 and 918.30

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Solution

The fourth proportional to 1,958.07, 2,936.97 and 918.30 is: 1,377.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.07 : 2,936.97 = 918.30 : x
  2. Step 2: Convert to fraction form
    1,958.07/2,936.97 = 918.30/x
  3. Step 3: Cross multiply
    1,958.07x = 2,936.97 × 918.30
  4. Step 4: Simplify right side
    1,958.07x = 2,697,034.01
  5. Step 5: Solve for x
    x = 2,697,034.01/1,958.07
  6. Step 6: Final answer
    x = 1,377.39

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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.