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Finding the Fourth Proportional to 1,228.27, 1,694.97 and 730.79

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Solution

The fourth proportional to 1,228.27, 1,694.97 and 730.79 is: 1,008.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.27 : 1,694.97 = 730.79 : x
  2. Step 2: Convert to fraction form
    1,228.27/1,694.97 = 730.79/x
  3. Step 3: Cross multiply
    1,228.27x = 1,694.97 × 730.79
  4. Step 4: Simplify right side
    1,228.27x = 1,238,671.36
  5. Step 5: Solve for x
    x = 1,238,671.36/1,228.27
  6. Step 6: Final answer
    x = 1,008.47

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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.