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Finding the Fourth Proportional to 3,751.56, 5,178.78 and 2,578.68

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Solution

The fourth proportional to 3,751.56, 5,178.78 and 2,578.68 is: 3,559.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,751.56 : 5,178.78 = 2,578.68 : x
  2. Step 2: Convert to fraction form
    3,751.56/5,178.78 = 2,578.68/x
  3. Step 3: Cross multiply
    3,751.56x = 5,178.78 × 2,578.68
  4. Step 4: Simplify right side
    3,751.56x = 13,354,416.41
  5. Step 5: Solve for x
    x = 13,354,416.41/3,751.56
  6. Step 6: Final answer
    x = 3,559.70

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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.