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Finding the Fourth Proportional to 5,329.11, 7,978.58 and 2,824.60

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Solution

The fourth proportional to 5,329.11, 7,978.58 and 2,824.60 is: 4,228.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,329.11 : 7,978.58 = 2,824.60 : x
  2. Step 2: Convert to fraction form
    5,329.11/7,978.58 = 2,824.60/x
  3. Step 3: Cross multiply
    5,329.11x = 7,978.58 × 2,824.60
  4. Step 4: Simplify right side
    5,329.11x = 22,536,297.07
  5. Step 5: Solve for x
    x = 22,536,297.07/5,329.11
  6. Step 6: Final answer
    x = 4,228.90

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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.