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Finding the Fourth Proportional to 3,971.05, 5,478.47 and 2,554.49

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Solution

The fourth proportional to 3,971.05, 5,478.47 and 2,554.49 is: 3,524.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.05 : 5,478.47 = 2,554.49 : x
  2. Step 2: Convert to fraction form
    3,971.05/5,478.47 = 2,554.49/x
  3. Step 3: Cross multiply
    3,971.05x = 5,478.47 × 2,554.49
  4. Step 4: Simplify right side
    3,971.05x = 13,994,707.33
  5. Step 5: Solve for x
    x = 13,994,707.33/3,971.05
  6. Step 6: Final answer
    x = 3,524.19

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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.