Home / 2,620.09-3,930.63-1,159.30

Finding the Fourth Proportional to 2,620.09, 3,930.63 and 1,159.30

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Solution

The fourth proportional to 2,620.09, 3,930.63 and 1,159.30 is: 1,739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.09 : 3,930.63 = 1,159.30 : x
  2. Step 2: Convert to fraction form
    2,620.09/3,930.63 = 1,159.30/x
  3. Step 3: Cross multiply
    2,620.09x = 3,930.63 × 1,159.30
  4. Step 4: Simplify right side
    2,620.09x = 4,556,779.36
  5. Step 5: Solve for x
    x = 4,556,779.36/2,620.09
  6. Step 6: Final answer
    x = 1,739.17

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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.