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Finding the Fourth Proportional to 1,811.96, 2,717.94 and 513.44

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Solution

The fourth proportional to 1,811.96, 2,717.94 and 513.44 is: 770.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.96 : 2,717.94 = 513.44 : x
  2. Step 2: Convert to fraction form
    1,811.96/2,717.94 = 513.44/x
  3. Step 3: Cross multiply
    1,811.96x = 2,717.94 × 513.44
  4. Step 4: Simplify right side
    1,811.96x = 1,395,499.11
  5. Step 5: Solve for x
    x = 1,395,499.11/1,811.96
  6. Step 6: Final answer
    x = 770.16

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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.