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Finding the Fourth Proportional to 1,310.23, 1,808.44 and 806.21

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Solution

The fourth proportional to 1,310.23, 1,808.44 and 806.21 is: 1,112.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.23 : 1,808.44 = 806.21 : x
  2. Step 2: Convert to fraction form
    1,310.23/1,808.44 = 806.21/x
  3. Step 3: Cross multiply
    1,310.23x = 1,808.44 × 806.21
  4. Step 4: Simplify right side
    1,310.23x = 1,457,969.34
  5. Step 5: Solve for x
    x = 1,457,969.34/1,310.23
  6. Step 6: Final answer
    x = 1,112.76

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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.