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Finding the Fourth Proportional to 1,308.92, 1,961.04 and 941.72

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Solution

The fourth proportional to 1,308.92, 1,961.04 and 941.72 is: 1,410.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.92 : 1,961.04 = 941.72 : x
  2. Step 2: Convert to fraction form
    1,308.92/1,961.04 = 941.72/x
  3. Step 3: Cross multiply
    1,308.92x = 1,961.04 × 941.72
  4. Step 4: Simplify right side
    1,308.92x = 1,846,750.59
  5. Step 5: Solve for x
    x = 1,846,750.59/1,308.92
  6. Step 6: Final answer
    x = 1,410.90

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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.