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Finding the Fourth Proportional to 447.48, 672.66 and 379.32

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Solution

The fourth proportional to 447.48, 672.66 and 379.32 is: 570.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.48 : 672.66 = 379.32 : x
  2. Step 2: Convert to fraction form
    447.48/672.66 = 379.32/x
  3. Step 3: Cross multiply
    447.48x = 672.66 × 379.32
  4. Step 4: Simplify right side
    447.48x = 255,153.39
  5. Step 5: Solve for x
    x = 255,153.39/447.48
  6. Step 6: Final answer
    x = 570.20

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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.