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Finding the Fourth Proportional to 3,854.96, 5,780.20 and 1,256.56

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Solution

The fourth proportional to 3,854.96, 5,780.20 and 1,256.56 is: 1,884.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,854.96 : 5,780.20 = 1,256.56 : x
  2. Step 2: Convert to fraction form
    3,854.96/5,780.20 = 1,256.56/x
  3. Step 3: Cross multiply
    3,854.96x = 5,780.20 × 1,256.56
  4. Step 4: Simplify right side
    3,854.96x = 7,263,168.11
  5. Step 5: Solve for x
    x = 7,263,168.11/3,854.96
  6. Step 6: Final answer
    x = 1,884.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.