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Finding the Fourth Proportional to 3,782.60, 5,676.12 and 1,591.16

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Solution

The fourth proportional to 3,782.60, 5,676.12 and 1,591.16 is: 2,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,782.60 : 5,676.12 = 1,591.16 : x
  2. Step 2: Convert to fraction form
    3,782.60/5,676.12 = 1,591.16/x
  3. Step 3: Cross multiply
    3,782.60x = 5,676.12 × 1,591.16
  4. Step 4: Simplify right side
    3,782.60x = 9,031,615.10
  5. Step 5: Solve for x
    x = 9,031,615.10/3,782.60
  6. Step 6: Final answer
    x = 2,387.67

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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.