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Finding the Fourth Proportional to 1,198.66, 1,798 and 505.34

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Solution

The fourth proportional to 1,198.66, 1,798 and 505.34 is: 758.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.66 : 1,798 = 505.34 : x
  2. Step 2: Convert to fraction form
    1,198.66/1,798 = 505.34/x
  3. Step 3: Cross multiply
    1,198.66x = 1,798 × 505.34
  4. Step 4: Simplify right side
    1,198.66x = 908,601.32
  5. Step 5: Solve for x
    x = 908,601.32/1,198.66
  6. Step 6: Final answer
    x = 758.01

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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.