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Finding the Fourth Proportional to 3,859.45, 5,326.05 and 2,091.05

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Solution

The fourth proportional to 3,859.45, 5,326.05 and 2,091.05 is: 2,885.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.45 : 5,326.05 = 2,091.05 : x
  2. Step 2: Convert to fraction form
    3,859.45/5,326.05 = 2,091.05/x
  3. Step 3: Cross multiply
    3,859.45x = 5,326.05 × 2,091.05
  4. Step 4: Simplify right side
    3,859.45x = 11,137,026.40
  5. Step 5: Solve for x
    x = 11,137,026.40/3,859.45
  6. Step 6: Final answer
    x = 2,885.65

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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.