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Finding the Fourth Proportional to 1,488.87, 2,231.96 and 838.22

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Solution

The fourth proportional to 1,488.87, 2,231.96 and 838.22 is: 1,256.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.87 : 2,231.96 = 838.22 : x
  2. Step 2: Convert to fraction form
    1,488.87/2,231.96 = 838.22/x
  3. Step 3: Cross multiply
    1,488.87x = 2,231.96 × 838.22
  4. Step 4: Simplify right side
    1,488.87x = 1,870,858.16
  5. Step 5: Solve for x
    x = 1,870,858.16/1,488.87
  6. Step 6: Final answer
    x = 1,256.56

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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.