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Finding the Fourth Proportional to 1,198.40, 1,795.96 and 905.66

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Solution

The fourth proportional to 1,198.40, 1,795.96 and 905.66 is: 1,357.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.40 : 1,795.96 = 905.66 : x
  2. Step 2: Convert to fraction form
    1,198.40/1,795.96 = 905.66/x
  3. Step 3: Cross multiply
    1,198.40x = 1,795.96 × 905.66
  4. Step 4: Simplify right side
    1,198.40x = 1,626,522.93
  5. Step 5: Solve for x
    x = 1,626,522.93/1,198.40
  6. Step 6: Final answer
    x = 1,357.25

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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.