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Finding the Fourth Proportional to 2,820.03, 3,891.61 and 1,578.03

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Solution

The fourth proportional to 2,820.03, 3,891.61 and 1,578.03 is: 2,177.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.03 : 3,891.61 = 1,578.03 : x
  2. Step 2: Convert to fraction form
    2,820.03/3,891.61 = 1,578.03/x
  3. Step 3: Cross multiply
    2,820.03x = 3,891.61 × 1,578.03
  4. Step 4: Simplify right side
    2,820.03x = 6,141,077.33
  5. Step 5: Solve for x
    x = 6,141,077.33/2,820.03
  6. Step 6: Final answer
    x = 2,177.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.