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Finding the Fourth Proportional to 1,268.66, 1,903.29 and 402.97

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Solution

The fourth proportional to 1,268.66, 1,903.29 and 402.97 is: 604.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.66 : 1,903.29 = 402.97 : x
  2. Step 2: Convert to fraction form
    1,268.66/1,903.29 = 402.97/x
  3. Step 3: Cross multiply
    1,268.66x = 1,903.29 × 402.97
  4. Step 4: Simplify right side
    1,268.66x = 766,968.77
  5. Step 5: Solve for x
    x = 766,968.77/1,268.66
  6. Step 6: Final answer
    x = 604.55

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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.