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Finding the Fourth Proportional to 3,890.64, 5,835.88 and 968.92

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Solution

The fourth proportional to 3,890.64, 5,835.88 and 968.92 is: 1,453.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.64 : 5,835.88 = 968.92 : x
  2. Step 2: Convert to fraction form
    3,890.64/5,835.88 = 968.92/x
  3. Step 3: Cross multiply
    3,890.64x = 5,835.88 × 968.92
  4. Step 4: Simplify right side
    3,890.64x = 5,654,500.85
  5. Step 5: Solve for x
    x = 5,654,500.85/3,890.64
  6. Step 6: Final answer
    x = 1,453.36

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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.