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Finding the Fourth Proportional to 1,338.81, 2,008.44 and 559.23

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Solution

The fourth proportional to 1,338.81, 2,008.44 and 559.23 is: 838.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.81 : 2,008.44 = 559.23 : x
  2. Step 2: Convert to fraction form
    1,338.81/2,008.44 = 559.23/x
  3. Step 3: Cross multiply
    1,338.81x = 2,008.44 × 559.23
  4. Step 4: Simplify right side
    1,338.81x = 1,123,179.90
  5. Step 5: Solve for x
    x = 1,123,179.90/1,338.81
  6. Step 6: Final answer
    x = 838.94

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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.