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Finding the Fourth Proportional to 1,779.49, 2,668.92 and 480.79

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Solution

The fourth proportional to 1,779.49, 2,668.92 and 480.79 is: 721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.49 : 2,668.92 = 480.79 : x
  2. Step 2: Convert to fraction form
    1,779.49/2,668.92 = 480.79/x
  3. Step 3: Cross multiply
    1,779.49x = 2,668.92 × 480.79
  4. Step 4: Simplify right side
    1,779.49x = 1,283,190.05
  5. Step 5: Solve for x
    x = 1,283,190.05/1,779.49
  6. Step 6: Final answer
    x = 721.10

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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.