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Finding the Fourth Proportional to 1,940.33, 2,910.94 and 553.68

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Solution

The fourth proportional to 1,940.33, 2,910.94 and 553.68 is: 830.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.33 : 2,910.94 = 553.68 : x
  2. Step 2: Convert to fraction form
    1,940.33/2,910.94 = 553.68/x
  3. Step 3: Cross multiply
    1,940.33x = 2,910.94 × 553.68
  4. Step 4: Simplify right side
    1,940.33x = 1,611,729.26
  5. Step 5: Solve for x
    x = 1,611,729.26/1,940.33
  6. Step 6: Final answer
    x = 830.65

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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.