Home / 2,619.48-3,929.22-1,320.64

Finding the Fourth Proportional to 2,619.48, 3,929.22 and 1,320.64

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Solution

The fourth proportional to 2,619.48, 3,929.22 and 1,320.64 is: 1,980.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.48 : 3,929.22 = 1,320.64 : x
  2. Step 2: Convert to fraction form
    2,619.48/3,929.22 = 1,320.64/x
  3. Step 3: Cross multiply
    2,619.48x = 3,929.22 × 1,320.64
  4. Step 4: Simplify right side
    2,619.48x = 5,189,085.10
  5. Step 5: Solve for x
    x = 5,189,085.10/2,619.48
  6. Step 6: Final answer
    x = 1,980.96

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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.