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Finding the Fourth Proportional to 1,268.67, 1,902.09 and 574.99

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Solution

The fourth proportional to 1,268.67, 1,902.09 and 574.99 is: 862.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.67 : 1,902.09 = 574.99 : x
  2. Step 2: Convert to fraction form
    1,268.67/1,902.09 = 574.99/x
  3. Step 3: Cross multiply
    1,268.67x = 1,902.09 × 574.99
  4. Step 4: Simplify right side
    1,268.67x = 1,093,680.13
  5. Step 5: Solve for x
    x = 1,093,680.13/1,268.67
  6. Step 6: Final answer
    x = 862.07

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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.