Home / 2,543.07-3,815.84-1,388.79

Finding the Fourth Proportional to 2,543.07, 3,815.84 and 1,388.79

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Solution

The fourth proportional to 2,543.07, 3,815.84 and 1,388.79 is: 2,083.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.07 : 3,815.84 = 1,388.79 : x
  2. Step 2: Convert to fraction form
    2,543.07/3,815.84 = 1,388.79/x
  3. Step 3: Cross multiply
    2,543.07x = 3,815.84 × 1,388.79
  4. Step 4: Simplify right side
    2,543.07x = 5,299,393.49
  5. Step 5: Solve for x
    x = 5,299,393.49/2,543.07
  6. Step 6: Final answer
    x = 2,083.86

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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.