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Finding the Fourth Proportional to 3,859.86, 5,326.56 and 2,091.44

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Solution

The fourth proportional to 3,859.86, 5,326.56 and 2,091.44 is: 2,886.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.86 : 5,326.56 = 2,091.44 : x
  2. Step 2: Convert to fraction form
    3,859.86/5,326.56 = 2,091.44/x
  3. Step 3: Cross multiply
    3,859.86x = 5,326.56 × 2,091.44
  4. Step 4: Simplify right side
    3,859.86x = 11,140,180.65
  5. Step 5: Solve for x
    x = 11,140,180.65/3,859.86
  6. Step 6: Final answer
    x = 2,886.16

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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.