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Finding the Fourth Proportional to 804.92, 1,111.28 and 755.28

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Solution

The fourth proportional to 804.92, 1,111.28 and 755.28 is: 1,042.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.92 : 1,111.28 = 755.28 : x
  2. Step 2: Convert to fraction form
    804.92/1,111.28 = 755.28/x
  3. Step 3: Cross multiply
    804.92x = 1,111.28 × 755.28
  4. Step 4: Simplify right side
    804.92x = 839,327.56
  5. Step 5: Solve for x
    x = 839,327.56/804.92
  6. Step 6: Final answer
    x = 1,042.75

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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.