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Finding the Fourth Proportional to 445.66, 615.15 and 298.33

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Solution

The fourth proportional to 445.66, 615.15 and 298.33 is: 411.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.66 : 615.15 = 298.33 : x
  2. Step 2: Convert to fraction form
    445.66/615.15 = 298.33/x
  3. Step 3: Cross multiply
    445.66x = 615.15 × 298.33
  4. Step 4: Simplify right side
    445.66x = 183,517.70
  5. Step 5: Solve for x
    x = 183,517.70/445.66
  6. Step 6: Final answer
    x = 411.79

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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.