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Finding the Fourth Proportional to 696.69, 1,043.82 and 679.68

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Solution

The fourth proportional to 696.69, 1,043.82 and 679.68 is: 1,018.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.69 : 1,043.82 = 679.68 : x
  2. Step 2: Convert to fraction form
    696.69/1,043.82 = 679.68/x
  3. Step 3: Cross multiply
    696.69x = 1,043.82 × 679.68
  4. Step 4: Simplify right side
    696.69x = 709,463.58
  5. Step 5: Solve for x
    x = 709,463.58/696.69
  6. Step 6: Final answer
    x = 1,018.33

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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.