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Finding the Fourth Proportional to 446.20, 615.18 and 288.56

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Solution

The fourth proportional to 446.20, 615.18 and 288.56 is: 397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.20 : 615.18 = 288.56 : x
  2. Step 2: Convert to fraction form
    446.20/615.18 = 288.56/x
  3. Step 3: Cross multiply
    446.20x = 615.18 × 288.56
  4. Step 4: Simplify right side
    446.20x = 177,517.88
  5. Step 5: Solve for x
    x = 177,517.88/446.20
  6. Step 6: Final answer
    x = 397.85

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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.