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Finding the Fourth Proportional to 441.68, 662.72 and 434.39

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Solution

The fourth proportional to 441.68, 662.72 and 434.39 is: 651.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.68 : 662.72 = 434.39 : x
  2. Step 2: Convert to fraction form
    441.68/662.72 = 434.39/x
  3. Step 3: Cross multiply
    441.68x = 662.72 × 434.39
  4. Step 4: Simplify right side
    441.68x = 287,873.46
  5. Step 5: Solve for x
    x = 287,873.46/441.68
  6. Step 6: Final answer
    x = 651.78

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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.