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Finding the Fourth Proportional to 439.84, 655.08 and 427.73

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Solution

The fourth proportional to 439.84, 655.08 and 427.73 is: 637.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.84 : 655.08 = 427.73 : x
  2. Step 2: Convert to fraction form
    439.84/655.08 = 427.73/x
  3. Step 3: Cross multiply
    439.84x = 655.08 × 427.73
  4. Step 4: Simplify right side
    439.84x = 280,197.38
  5. Step 5: Solve for x
    x = 280,197.38/439.84
  6. Step 6: Final answer
    x = 637.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.