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Finding the Fourth Proportional to 1,228.11, 1,694.71 and 696.93

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Solution

The fourth proportional to 1,228.11, 1,694.71 and 696.93 is: 961.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.11 : 1,694.71 = 696.93 : x
  2. Step 2: Convert to fraction form
    1,228.11/1,694.71 = 696.93/x
  3. Step 3: Cross multiply
    1,228.11x = 1,694.71 × 696.93
  4. Step 4: Simplify right side
    1,228.11x = 1,181,094.24
  5. Step 5: Solve for x
    x = 1,181,094.24/1,228.11
  6. Step 6: Final answer
    x = 961.72

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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.