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Finding the Fourth Proportional to 911.89, 1,368.09 and 295.58

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Solution

The fourth proportional to 911.89, 1,368.09 and 295.58 is: 443.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.89 : 1,368.09 = 295.58 : x
  2. Step 2: Convert to fraction form
    911.89/1,368.09 = 295.58/x
  3. Step 3: Cross multiply
    911.89x = 1,368.09 × 295.58
  4. Step 4: Simplify right side
    911.89x = 404,373.20
  5. Step 5: Solve for x
    x = 404,373.20/911.89
  6. Step 6: Final answer
    x = 443.45

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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.