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Finding the Fourth Proportional to 445.91, 615.34 and 256.85

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Solution

The fourth proportional to 445.91, 615.34 and 256.85 is: 354.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.91 : 615.34 = 256.85 : x
  2. Step 2: Convert to fraction form
    445.91/615.34 = 256.85/x
  3. Step 3: Cross multiply
    445.91x = 615.34 × 256.85
  4. Step 4: Simplify right side
    445.91x = 158,049.63
  5. Step 5: Solve for x
    x = 158,049.63/445.91
  6. Step 6: Final answer
    x = 354.44

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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.