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Finding the Fourth Proportional to 1,229.57, 1,696.41 and 835.91

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Solution

The fourth proportional to 1,229.57, 1,696.41 and 835.91 is: 1,153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.57 : 1,696.41 = 835.91 : x
  2. Step 2: Convert to fraction form
    1,229.57/1,696.41 = 835.91/x
  3. Step 3: Cross multiply
    1,229.57x = 1,696.41 × 835.91
  4. Step 4: Simplify right side
    1,229.57x = 1,418,037.60
  5. Step 5: Solve for x
    x = 1,418,037.60/1,229.57
  6. Step 6: Final answer
    x = 1,153.28

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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.