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Finding the Fourth Proportional to 911.44, 1,256.52 and 836.56

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Solution

The fourth proportional to 911.44, 1,256.52 and 836.56 is: 1,153.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.44 : 1,256.52 = 836.56 : x
  2. Step 2: Convert to fraction form
    911.44/1,256.52 = 836.56/x
  3. Step 3: Cross multiply
    911.44x = 1,256.52 × 836.56
  4. Step 4: Simplify right side
    911.44x = 1,051,154.37
  5. Step 5: Solve for x
    x = 1,051,154.37/911.44
  6. Step 6: Final answer
    x = 1,153.29

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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.