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Finding the Fourth Proportional to 625.70, 863.45 and 349.70

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Solution

The fourth proportional to 625.70, 863.45 and 349.70 is: 482.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.70 : 863.45 = 349.70 : x
  2. Step 2: Convert to fraction form
    625.70/863.45 = 349.70/x
  3. Step 3: Cross multiply
    625.70x = 863.45 × 349.70
  4. Step 4: Simplify right side
    625.70x = 301,942.40
  5. Step 5: Solve for x
    x = 301,942.40/625.70
  6. Step 6: Final answer
    x = 482.57

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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.