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Finding the Fourth Proportional to 819.37, 1,131.84 and 654.74

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Solution

The fourth proportional to 819.37, 1,131.84 and 654.74 is: 904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.37 : 1,131.84 = 654.74 : x
  2. Step 2: Convert to fraction form
    819.37/1,131.84 = 654.74/x
  3. Step 3: Cross multiply
    819.37x = 1,131.84 × 654.74
  4. Step 4: Simplify right side
    819.37x = 741,057.65
  5. Step 5: Solve for x
    x = 741,057.65/819.37
  6. Step 6: Final answer
    x = 904.42

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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.