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Finding the Fourth Proportional to 1,193.81, 1,647.35 and 696.49

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Solution

The fourth proportional to 1,193.81, 1,647.35 and 696.49 is: 961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.81 : 1,647.35 = 696.49 : x
  2. Step 2: Convert to fraction form
    1,193.81/1,647.35 = 696.49/x
  3. Step 3: Cross multiply
    1,193.81x = 1,647.35 × 696.49
  4. Step 4: Simplify right side
    1,193.81x = 1,147,366.92
  5. Step 5: Solve for x
    x = 1,147,366.92/1,193.81
  6. Step 6: Final answer
    x = 961.10

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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.