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Finding the Fourth Proportional to 1,813.64, 2,718.81 and 717.75

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Solution

The fourth proportional to 1,813.64, 2,718.81 and 717.75 is: 1,075.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.64 : 2,718.81 = 717.75 : x
  2. Step 2: Convert to fraction form
    1,813.64/2,718.81 = 717.75/x
  3. Step 3: Cross multiply
    1,813.64x = 2,718.81 × 717.75
  4. Step 4: Simplify right side
    1,813.64x = 1,951,425.88
  5. Step 5: Solve for x
    x = 1,951,425.88/1,813.64
  6. Step 6: Final answer
    x = 1,075.97

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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.