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Finding the Fourth Proportional to 1,812.86, 2,718 and 758.64

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Solution

The fourth proportional to 1,812.86, 2,718 and 758.64 is: 1,137.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.86 : 2,718 = 758.64 : x
  2. Step 2: Convert to fraction form
    1,812.86/2,718 = 758.64/x
  3. Step 3: Cross multiply
    1,812.86x = 2,718 × 758.64
  4. Step 4: Simplify right side
    1,812.86x = 2,061,983.52
  5. Step 5: Solve for x
    x = 2,061,983.52/1,812.86
  6. Step 6: Final answer
    x = 1,137.42

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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.