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Finding the Fourth Proportional to 447.12, 670.80 and 203.72

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Solution

The fourth proportional to 447.12, 670.80 and 203.72 is: 305.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.12 : 670.80 = 203.72 : x
  2. Step 2: Convert to fraction form
    447.12/670.80 = 203.72/x
  3. Step 3: Cross multiply
    447.12x = 670.80 × 203.72
  4. Step 4: Simplify right side
    447.12x = 136,655.38
  5. Step 5: Solve for x
    x = 136,655.38/447.12
  6. Step 6: Final answer
    x = 305.63

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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.