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Finding the Fourth Proportional to 3,705.68, 5,115.68 and 2,447.56

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Solution

The fourth proportional to 3,705.68, 5,115.68 and 2,447.56 is: 3,378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,705.68 : 5,115.68 = 2,447.56 : x
  2. Step 2: Convert to fraction form
    3,705.68/5,115.68 = 2,447.56/x
  3. Step 3: Cross multiply
    3,705.68x = 5,115.68 × 2,447.56
  4. Step 4: Simplify right side
    3,705.68x = 12,520,933.74
  5. Step 5: Solve for x
    x = 12,520,933.74/3,705.68
  6. Step 6: Final answer
    x = 3,378.85

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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.