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Finding the Fourth Proportional to 2,655.63, 3,979.80 and 1,679.99

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Solution

The fourth proportional to 2,655.63, 3,979.80 and 1,679.99 is: 2,517.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.63 : 3,979.80 = 1,679.99 : x
  2. Step 2: Convert to fraction form
    2,655.63/3,979.80 = 1,679.99/x
  3. Step 3: Cross multiply
    2,655.63x = 3,979.80 × 1,679.99
  4. Step 4: Simplify right side
    2,655.63x = 6,686,004.30
  5. Step 5: Solve for x
    x = 6,686,004.30/2,655.63
  6. Step 6: Final answer
    x = 2,517.67

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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.