Home / 3,780.30-5,666.40-1,439.40

Finding the Fourth Proportional to 3,780.30, 5,666.40 and 1,439.40

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Solution

The fourth proportional to 3,780.30, 5,666.40 and 1,439.40 is: 2,157.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.30 : 5,666.40 = 1,439.40 : x
  2. Step 2: Convert to fraction form
    3,780.30/5,666.40 = 1,439.40/x
  3. Step 3: Cross multiply
    3,780.30x = 5,666.40 × 1,439.40
  4. Step 4: Simplify right side
    3,780.30x = 8,156,216.16
  5. Step 5: Solve for x
    x = 8,156,216.16/3,780.30
  6. Step 6: Final answer
    x = 2,157.56

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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.