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Finding the Fourth Proportional to 1,799.40, 2,696.11 and 628.78

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Solution

The fourth proportional to 1,799.40, 2,696.11 and 628.78 is: 942.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,799.40 : 2,696.11 = 628.78 : x
  2. Step 2: Convert to fraction form
    1,799.40/2,696.11 = 628.78/x
  3. Step 3: Cross multiply
    1,799.40x = 2,696.11 × 628.78
  4. Step 4: Simplify right side
    1,799.40x = 1,695,260.05
  5. Step 5: Solve for x
    x = 1,695,260.05/1,799.40
  6. Step 6: Final answer
    x = 942.13

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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.