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Finding the Fourth Proportional to 1,308.68, 1,963.30 and 443.56

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Solution

The fourth proportional to 1,308.68, 1,963.30 and 443.56 is: 665.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.68 : 1,963.30 = 443.56 : x
  2. Step 2: Convert to fraction form
    1,308.68/1,963.30 = 443.56/x
  3. Step 3: Cross multiply
    1,308.68x = 1,963.30 × 443.56
  4. Step 4: Simplify right side
    1,308.68x = 870,841.35
  5. Step 5: Solve for x
    x = 870,841.35/1,308.68
  6. Step 6: Final answer
    x = 665.43

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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.