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Finding the Fourth Proportional to 1,216.09, 1,823.96 and 756.82

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Solution

The fourth proportional to 1,216.09, 1,823.96 and 756.82 is: 1,135.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.09 : 1,823.96 = 756.82 : x
  2. Step 2: Convert to fraction form
    1,216.09/1,823.96 = 756.82/x
  3. Step 3: Cross multiply
    1,216.09x = 1,823.96 × 756.82
  4. Step 4: Simplify right side
    1,216.09x = 1,380,403.13
  5. Step 5: Solve for x
    x = 1,380,403.13/1,216.09
  6. Step 6: Final answer
    x = 1,135.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.