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Finding the Fourth Proportional to 2,157.54, 3,230.15 and 1,639.64

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Solution

The fourth proportional to 2,157.54, 3,230.15 and 1,639.64 is: 2,454.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.54 : 3,230.15 = 1,639.64 : x
  2. Step 2: Convert to fraction form
    2,157.54/3,230.15 = 1,639.64/x
  3. Step 3: Cross multiply
    2,157.54x = 3,230.15 × 1,639.64
  4. Step 4: Simplify right side
    2,157.54x = 5,296,296.86
  5. Step 5: Solve for x
    x = 5,296,296.86/2,157.54
  6. Step 6: Final answer
    x = 2,454.79

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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.