Home / 2,721.76-4,080.08-1,420.64

Finding the Fourth Proportional to 2,721.76, 4,080.08 and 1,420.64

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Solution

The fourth proportional to 2,721.76, 4,080.08 and 1,420.64 is: 2,129.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.76 : 4,080.08 = 1,420.64 : x
  2. Step 2: Convert to fraction form
    2,721.76/4,080.08 = 1,420.64/x
  3. Step 3: Cross multiply
    2,721.76x = 4,080.08 × 1,420.64
  4. Step 4: Simplify right side
    2,721.76x = 5,796,324.85
  5. Step 5: Solve for x
    x = 5,796,324.85/2,721.76
  6. Step 6: Final answer
    x = 2,129.62

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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.