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Finding the Fourth Proportional to 2,758.26, 4,137.46 and 810.53

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Solution

The fourth proportional to 2,758.26, 4,137.46 and 810.53 is: 1,215.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.26 : 4,137.46 = 810.53 : x
  2. Step 2: Convert to fraction form
    2,758.26/4,137.46 = 810.53/x
  3. Step 3: Cross multiply
    2,758.26x = 4,137.46 × 810.53
  4. Step 4: Simplify right side
    2,758.26x = 3,353,512.74
  5. Step 5: Solve for x
    x = 3,353,512.74/2,758.26
  6. Step 6: Final answer
    x = 1,215.81

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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.