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Finding the Fourth Proportional to 1,305.26, 1,958.02 and 439.64

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Solution

The fourth proportional to 1,305.26, 1,958.02 and 439.64 is: 659.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.26 : 1,958.02 = 439.64 : x
  2. Step 2: Convert to fraction form
    1,305.26/1,958.02 = 439.64/x
  3. Step 3: Cross multiply
    1,305.26x = 1,958.02 × 439.64
  4. Step 4: Simplify right side
    1,305.26x = 860,813.02
  5. Step 5: Solve for x
    x = 860,813.02/1,305.26
  6. Step 6: Final answer
    x = 659.50

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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.