Home / 1,268.40-1,905.35-1,073.79

Finding the Fourth Proportional to 1,268.40, 1,905.35 and 1,073.79

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Solution

The fourth proportional to 1,268.40, 1,905.35 and 1,073.79 is: 1,613.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.40 : 1,905.35 = 1,073.79 : x
  2. Step 2: Convert to fraction form
    1,268.40/1,905.35 = 1,073.79/x
  3. Step 3: Cross multiply
    1,268.40x = 1,905.35 × 1,073.79
  4. Step 4: Simplify right side
    1,268.40x = 2,045,947.55
  5. Step 5: Solve for x
    x = 2,045,947.55/1,268.40
  6. Step 6: Final answer
    x = 1,613.02

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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.