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Finding the Fourth Proportional to 447.36, 615.98 and 380.85

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Solution

The fourth proportional to 447.36, 615.98 and 380.85 is: 524.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.36 : 615.98 = 380.85 : x
  2. Step 2: Convert to fraction form
    447.36/615.98 = 380.85/x
  3. Step 3: Cross multiply
    447.36x = 615.98 × 380.85
  4. Step 4: Simplify right side
    447.36x = 234,594.08
  5. Step 5: Solve for x
    x = 234,594.08/447.36
  6. Step 6: Final answer
    x = 524.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.