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Finding the Fourth Proportional to 1,181.29, 1,629.87 and 683.95

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Solution

The fourth proportional to 1,181.29, 1,629.87 and 683.95 is: 943.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.29 : 1,629.87 = 683.95 : x
  2. Step 2: Convert to fraction form
    1,181.29/1,629.87 = 683.95/x
  3. Step 3: Cross multiply
    1,181.29x = 1,629.87 × 683.95
  4. Step 4: Simplify right side
    1,181.29x = 1,114,749.59
  5. Step 5: Solve for x
    x = 1,114,749.59/1,181.29
  6. Step 6: Final answer
    x = 943.67

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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.