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Finding the Fourth Proportional to 625.85, 863.55 and 356.62

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Solution

The fourth proportional to 625.85, 863.55 and 356.62 is: 492.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.85 : 863.55 = 356.62 : x
  2. Step 2: Convert to fraction form
    625.85/863.55 = 356.62/x
  3. Step 3: Cross multiply
    625.85x = 863.55 × 356.62
  4. Step 4: Simplify right side
    625.85x = 307,959.20
  5. Step 5: Solve for x
    x = 307,959.20/625.85
  6. Step 6: Final answer
    x = 492.07

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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.