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Finding the Fourth Proportional to 3,780.64, 5,672.31 and 1,933.30

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Solution

The fourth proportional to 3,780.64, 5,672.31 and 1,933.30 is: 2,900.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.64 : 5,672.31 = 1,933.30 : x
  2. Step 2: Convert to fraction form
    3,780.64/5,672.31 = 1,933.30/x
  3. Step 3: Cross multiply
    3,780.64x = 5,672.31 × 1,933.30
  4. Step 4: Simplify right side
    3,780.64x = 10,966,276.92
  5. Step 5: Solve for x
    x = 10,966,276.92/3,780.64
  6. Step 6: Final answer
    x = 2,900.64

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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.