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Finding the Fourth Proportional to 2,186.68, 3,280.68 and 1,262.88

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Solution

The fourth proportional to 2,186.68, 3,280.68 and 1,262.88 is: 1,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.68 : 3,280.68 = 1,262.88 : x
  2. Step 2: Convert to fraction form
    2,186.68/3,280.68 = 1,262.88/x
  3. Step 3: Cross multiply
    2,186.68x = 3,280.68 × 1,262.88
  4. Step 4: Simplify right side
    2,186.68x = 4,143,105.16
  5. Step 5: Solve for x
    x = 4,143,105.16/2,186.68
  6. Step 6: Final answer
    x = 1,894.70

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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.