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Finding the Fourth Proportional to 447.45, 670.86 and 203.64

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Solution

The fourth proportional to 447.45, 670.86 and 203.64 is: 305.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.45 : 670.86 = 203.64 : x
  2. Step 2: Convert to fraction form
    447.45/670.86 = 203.64/x
  3. Step 3: Cross multiply
    447.45x = 670.86 × 203.64
  4. Step 4: Simplify right side
    447.45x = 136,613.93
  5. Step 5: Solve for x
    x = 136,613.93/447.45
  6. Step 6: Final answer
    x = 305.32

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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.