Home / 2,781.88-4,173.48-1,320.28

Finding the Fourth Proportional to 2,781.88, 4,173.48 and 1,320.28

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Solution

The fourth proportional to 2,781.88, 4,173.48 and 1,320.28 is: 1,980.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.88 : 4,173.48 = 1,320.28 : x
  2. Step 2: Convert to fraction form
    2,781.88/4,173.48 = 1,320.28/x
  3. Step 3: Cross multiply
    2,781.88x = 4,173.48 × 1,320.28
  4. Step 4: Simplify right side
    2,781.88x = 5,510,162.17
  5. Step 5: Solve for x
    x = 5,510,162.17/2,781.88
  6. Step 6: Final answer
    x = 1,980.73

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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.