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Finding the Fourth Proportional to 804.54, 1,115.49 and 760.80

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Solution

The fourth proportional to 804.54, 1,115.49 and 760.80 is: 1,054.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.54 : 1,115.49 = 760.80 : x
  2. Step 2: Convert to fraction form
    804.54/1,115.49 = 760.80/x
  3. Step 3: Cross multiply
    804.54x = 1,115.49 × 760.80
  4. Step 4: Simplify right side
    804.54x = 848,664.79
  5. Step 5: Solve for x
    x = 848,664.79/804.54
  6. Step 6: Final answer
    x = 1,054.84

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.