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Finding the Fourth Proportional to 1,268.52, 1,903.14 and 1,087.08

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Solution

The fourth proportional to 1,268.52, 1,903.14 and 1,087.08 is: 1,630.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.52 : 1,903.14 = 1,087.08 : x
  2. Step 2: Convert to fraction form
    1,268.52/1,903.14 = 1,087.08/x
  3. Step 3: Cross multiply
    1,268.52x = 1,903.14 × 1,087.08
  4. Step 4: Simplify right side
    1,268.52x = 2,068,865.43
  5. Step 5: Solve for x
    x = 2,068,865.43/1,268.52
  6. Step 6: Final answer
    x = 1,630.93

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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.