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Finding the Fourth Proportional to 1,627.76, 2,439.80 and 806.60

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Solution

The fourth proportional to 1,627.76, 2,439.80 and 806.60 is: 1,208.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.76 : 2,439.80 = 806.60 : x
  2. Step 2: Convert to fraction form
    1,627.76/2,439.80 = 806.60/x
  3. Step 3: Cross multiply
    1,627.76x = 2,439.80 × 806.60
  4. Step 4: Simplify right side
    1,627.76x = 1,967,942.68
  5. Step 5: Solve for x
    x = 1,967,942.68/1,627.76
  6. Step 6: Final answer
    x = 1,208.99

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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.