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Finding the Fourth Proportional to 1,268.51, 1,902.79 and 446.59

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Solution

The fourth proportional to 1,268.51, 1,902.79 and 446.59 is: 669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.51 : 1,902.79 = 446.59 : x
  2. Step 2: Convert to fraction form
    1,268.51/1,902.79 = 446.59/x
  3. Step 3: Cross multiply
    1,268.51x = 1,902.79 × 446.59
  4. Step 4: Simplify right side
    1,268.51x = 849,769.92
  5. Step 5: Solve for x
    x = 849,769.92/1,268.51
  6. Step 6: Final answer
    x = 669.90

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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.