Home / 2,222.40-3,328.80-1,979.20

Finding the Fourth Proportional to 2,222.40, 3,328.80 and 1,979.20

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Solution

The fourth proportional to 2,222.40, 3,328.80 and 1,979.20 is: 2,964.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,222.40 : 3,328.80 = 1,979.20 : x
  2. Step 2: Convert to fraction form
    2,222.40/3,328.80 = 1,979.20/x
  3. Step 3: Cross multiply
    2,222.40x = 3,328.80 × 1,979.20
  4. Step 4: Simplify right side
    2,222.40x = 6,588,360.96
  5. Step 5: Solve for x
    x = 6,588,360.96/2,222.40
  6. Step 6: Final answer
    x = 2,964.53

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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.