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Finding the Fourth Proportional to 2,668.55, 4,000.79 and 1,628.30

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Solution

The fourth proportional to 2,668.55, 4,000.79 and 1,628.30 is: 2,441.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.55 : 4,000.79 = 1,628.30 : x
  2. Step 2: Convert to fraction form
    2,668.55/4,000.79 = 1,628.30/x
  3. Step 3: Cross multiply
    2,668.55x = 4,000.79 × 1,628.30
  4. Step 4: Simplify right side
    2,668.55x = 6,514,500.43
  5. Step 5: Solve for x
    x = 6,514,500.43/2,668.55
  6. Step 6: Final answer
    x = 2,441.22

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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.