Home / 2,419.60-3,633.80-2,117.20

Finding the Fourth Proportional to 2,419.60, 3,633.80 and 2,117.20

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Solution

The fourth proportional to 2,419.60, 3,633.80 and 2,117.20 is: 3,179.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.60 : 3,633.80 = 2,117.20 : x
  2. Step 2: Convert to fraction form
    2,419.60/3,633.80 = 2,117.20/x
  3. Step 3: Cross multiply
    2,419.60x = 3,633.80 × 2,117.20
  4. Step 4: Simplify right side
    2,419.60x = 7,693,481.36
  5. Step 5: Solve for x
    x = 7,693,481.36/2,419.60
  6. Step 6: Final answer
    x = 3,179.65

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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.