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Finding the Fourth Proportional to 2,445.75, 3,375.20 and 1,383.68

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Solution

The fourth proportional to 2,445.75, 3,375.20 and 1,383.68 is: 1,909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445.75 : 3,375.20 = 1,383.68 : x
  2. Step 2: Convert to fraction form
    2,445.75/3,375.20 = 1,383.68/x
  3. Step 3: Cross multiply
    2,445.75x = 3,375.20 × 1,383.68
  4. Step 4: Simplify right side
    2,445.75x = 4,670,189.65
  5. Step 5: Solve for x
    x = 4,670,189.65/2,445.75
  6. Step 6: Final answer
    x = 1,909.51

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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.