Home / 2,721.51-4,084.41-1,405.20

Finding the Fourth Proportional to 2,721.51, 4,084.41 and 1,405.20

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Solution

The fourth proportional to 2,721.51, 4,084.41 and 1,405.20 is: 2,108.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.51 : 4,084.41 = 1,405.20 : x
  2. Step 2: Convert to fraction form
    2,721.51/4,084.41 = 1,405.20/x
  3. Step 3: Cross multiply
    2,721.51x = 4,084.41 × 1,405.20
  4. Step 4: Simplify right side
    2,721.51x = 5,739,412.93
  5. Step 5: Solve for x
    x = 5,739,412.93/2,721.51
  6. Step 6: Final answer
    x = 2,108.91

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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.