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Finding the Fourth Proportional to 2,721.65, 4,080.65 and 1,260.00

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Solution

The fourth proportional to 2,721.65, 4,080.65 and 1,260.00 is: 1,889.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.65 : 4,080.65 = 1,260.00 : x
  2. Step 2: Convert to fraction form
    2,721.65/4,080.65 = 1,260.00/x
  3. Step 3: Cross multiply
    2,721.65x = 4,080.65 × 1,260.00
  4. Step 4: Simplify right side
    2,721.65x = 5,141,626.05
  5. Step 5: Solve for x
    x = 5,141,626.05/2,721.65
  6. Step 6: Final answer
    x = 1,889.16

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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.