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Finding the Fourth Proportional to 911.90, 1,368.05 and 295.56

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Solution

The fourth proportional to 911.90, 1,368.05 and 295.56 is: 443.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.90 : 1,368.05 = 295.56 : x
  2. Step 2: Convert to fraction form
    911.90/1,368.05 = 295.56/x
  3. Step 3: Cross multiply
    911.90x = 1,368.05 × 295.56
  4. Step 4: Simplify right side
    911.90x = 404,339.38
  5. Step 5: Solve for x
    x = 404,339.38/911.90
  6. Step 6: Final answer
    x = 443.41

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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.