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Finding the Fourth Proportional to 1,268.55, 1,750.49 and 708.97

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Solution

The fourth proportional to 1,268.55, 1,750.49 and 708.97 is: 978.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.55 : 1,750.49 = 708.97 : x
  2. Step 2: Convert to fraction form
    1,268.55/1,750.49 = 708.97/x
  3. Step 3: Cross multiply
    1,268.55x = 1,750.49 × 708.97
  4. Step 4: Simplify right side
    1,268.55x = 1,241,044.90
  5. Step 5: Solve for x
    x = 1,241,044.90/1,268.55
  6. Step 6: Final answer
    x = 978.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.