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Finding the Fourth Proportional to 625.82, 863.98 and 439.88

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Solution

The fourth proportional to 625.82, 863.98 and 439.88 is: 607.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.82 : 863.98 = 439.88 : x
  2. Step 2: Convert to fraction form
    625.82/863.98 = 439.88/x
  3. Step 3: Cross multiply
    625.82x = 863.98 × 439.88
  4. Step 4: Simplify right side
    625.82x = 380,047.52
  5. Step 5: Solve for x
    x = 380,047.52/625.82
  6. Step 6: Final answer
    x = 607.28

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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.