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Finding the Fourth Proportional to 3,175.55, 4,381.44 and 1,917.32

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Solution

The fourth proportional to 3,175.55, 4,381.44 and 1,917.32 is: 2,645.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,175.55 : 4,381.44 = 1,917.32 : x
  2. Step 2: Convert to fraction form
    3,175.55/4,381.44 = 1,917.32/x
  3. Step 3: Cross multiply
    3,175.55x = 4,381.44 × 1,917.32
  4. Step 4: Simplify right side
    3,175.55x = 8,400,628.87
  5. Step 5: Solve for x
    x = 8,400,628.87/3,175.55
  6. Step 6: Final answer
    x = 2,645.41

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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.