Home / 1,268.36-1,902.23-402.68

Finding the Fourth Proportional to 1,268.36, 1,902.23 and 402.68

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Solution

The fourth proportional to 1,268.36, 1,902.23 and 402.68 is: 603.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.36 : 1,902.23 = 402.68 : x
  2. Step 2: Convert to fraction form
    1,268.36/1,902.23 = 402.68/x
  3. Step 3: Cross multiply
    1,268.36x = 1,902.23 × 402.68
  4. Step 4: Simplify right side
    1,268.36x = 765,978.45
  5. Step 5: Solve for x
    x = 765,978.45/1,268.36
  6. Step 6: Final answer
    x = 603.91

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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.