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Finding the Fourth Proportional to 1,718.21, 2,578.66 and 793.88

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Solution

The fourth proportional to 1,718.21, 2,578.66 and 793.88 is: 1,191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.21 : 2,578.66 = 793.88 : x
  2. Step 2: Convert to fraction form
    1,718.21/2,578.66 = 793.88/x
  3. Step 3: Cross multiply
    1,718.21x = 2,578.66 × 793.88
  4. Step 4: Simplify right side
    1,718.21x = 2,047,136.37
  5. Step 5: Solve for x
    x = 2,047,136.37/1,718.21
  6. Step 6: Final answer
    x = 1,191.43

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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.