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Finding the Fourth Proportional to 2,644.65, 3,967.21 and 1,084.76

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Solution

The fourth proportional to 2,644.65, 3,967.21 and 1,084.76 is: 1,627.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,644.65 : 3,967.21 = 1,084.76 : x
  2. Step 2: Convert to fraction form
    2,644.65/3,967.21 = 1,084.76/x
  3. Step 3: Cross multiply
    2,644.65x = 3,967.21 × 1,084.76
  4. Step 4: Simplify right side
    2,644.65x = 4,303,467.12
  5. Step 5: Solve for x
    x = 4,303,467.12/2,644.65
  6. Step 6: Final answer
    x = 1,627.24

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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.