Home / 1,779.18-2,668.38-480.36

Finding the Fourth Proportional to 1,779.18, 2,668.38 and 480.36

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Solution

The fourth proportional to 1,779.18, 2,668.38 and 480.36 is: 720.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.18 : 2,668.38 = 480.36 : x
  2. Step 2: Convert to fraction form
    1,779.18/2,668.38 = 480.36/x
  3. Step 3: Cross multiply
    1,779.18x = 2,668.38 × 480.36
  4. Step 4: Simplify right side
    1,779.18x = 1,281,783.02
  5. Step 5: Solve for x
    x = 1,281,783.02/1,779.18
  6. Step 6: Final answer
    x = 720.43

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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.