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Finding the Fourth Proportional to 1,268.11, 1,902.18 and 446.41

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Solution

The fourth proportional to 1,268.11, 1,902.18 and 446.41 is: 669.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.11 : 1,902.18 = 446.41 : x
  2. Step 2: Convert to fraction form
    1,268.11/1,902.18 = 446.41/x
  3. Step 3: Cross multiply
    1,268.11x = 1,902.18 × 446.41
  4. Step 4: Simplify right side
    1,268.11x = 849,142.66
  5. Step 5: Solve for x
    x = 849,142.66/1,268.11
  6. Step 6: Final answer
    x = 669.62

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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.