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Finding the Fourth Proportional to 1,246.21, 1,719.79 and 804.88

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Solution

The fourth proportional to 1,246.21, 1,719.79 and 804.88 is: 1,110.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.21 : 1,719.79 = 804.88 : x
  2. Step 2: Convert to fraction form
    1,246.21/1,719.79 = 804.88/x
  3. Step 3: Cross multiply
    1,246.21x = 1,719.79 × 804.88
  4. Step 4: Simplify right side
    1,246.21x = 1,384,213.36
  5. Step 5: Solve for x
    x = 1,384,213.36/1,246.21
  6. Step 6: Final answer
    x = 1,110.74

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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.