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Finding the Fourth Proportional to 1,268.75, 1,903.10 and 344.23

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Solution

The fourth proportional to 1,268.75, 1,903.10 and 344.23 is: 516.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.75 : 1,903.10 = 344.23 : x
  2. Step 2: Convert to fraction form
    1,268.75/1,903.10 = 344.23/x
  3. Step 3: Cross multiply
    1,268.75x = 1,903.10 × 344.23
  4. Step 4: Simplify right side
    1,268.75x = 655,104.11
  5. Step 5: Solve for x
    x = 655,104.11/1,268.75
  6. Step 6: Final answer
    x = 516.34

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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.