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Finding the Fourth Proportional to 1,268.09, 1,902.40 and 537.65

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Solution

The fourth proportional to 1,268.09, 1,902.40 and 537.65 is: 806.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.09 : 1,902.40 = 537.65 : x
  2. Step 2: Convert to fraction form
    1,268.09/1,902.40 = 537.65/x
  3. Step 3: Cross multiply
    1,268.09x = 1,902.40 × 537.65
  4. Step 4: Simplify right side
    1,268.09x = 1,022,813.16
  5. Step 5: Solve for x
    x = 1,022,813.16/1,268.09
  6. Step 6: Final answer
    x = 806.58

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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.