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Finding the Fourth Proportional to 445.89, 615.83 and 439.82

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Solution

The fourth proportional to 445.89, 615.83 and 439.82 is: 607.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.89 : 615.83 = 439.82 : x
  2. Step 2: Convert to fraction form
    445.89/615.83 = 439.82/x
  3. Step 3: Cross multiply
    445.89x = 615.83 × 439.82
  4. Step 4: Simplify right side
    445.89x = 270,854.35
  5. Step 5: Solve for x
    x = 270,854.35/445.89
  6. Step 6: Final answer
    x = 607.45

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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.