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Finding the Fourth Proportional to 1,268.02, 1,900.73 and 920.49

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Solution

The fourth proportional to 1,268.02, 1,900.73 and 920.49 is: 1,379.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.02 : 1,900.73 = 920.49 : x
  2. Step 2: Convert to fraction form
    1,268.02/1,900.73 = 920.49/x
  3. Step 3: Cross multiply
    1,268.02x = 1,900.73 × 920.49
  4. Step 4: Simplify right side
    1,268.02x = 1,749,602.96
  5. Step 5: Solve for x
    x = 1,749,602.96/1,268.02
  6. Step 6: Final answer
    x = 1,379.79

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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.