Home / 2,221.76-3,328.30-1,913.60

Finding the Fourth Proportional to 2,221.76, 3,328.30 and 1,913.60

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Solution

The fourth proportional to 2,221.76, 3,328.30 and 1,913.60 is: 2,866.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.76 : 3,328.30 = 1,913.60 : x
  2. Step 2: Convert to fraction form
    2,221.76/3,328.30 = 1,913.60/x
  3. Step 3: Cross multiply
    2,221.76x = 3,328.30 × 1,913.60
  4. Step 4: Simplify right side
    2,221.76x = 6,369,034.88
  5. Step 5: Solve for x
    x = 6,369,034.88/2,221.76
  6. Step 6: Final answer
    x = 2,866.66

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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.