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Finding the Fourth Proportional to 696.26, 1,044.56 and 285.39

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Solution

The fourth proportional to 696.26, 1,044.56 and 285.39 is: 428.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.26 : 1,044.56 = 285.39 : x
  2. Step 2: Convert to fraction form
    696.26/1,044.56 = 285.39/x
  3. Step 3: Cross multiply
    696.26x = 1,044.56 × 285.39
  4. Step 4: Simplify right side
    696.26x = 298,107.69
  5. Step 5: Solve for x
    x = 298,107.69/696.26
  6. Step 6: Final answer
    x = 428.15

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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.