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Finding the Fourth Proportional to 625.71, 863.47 and 345.94

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Solution

The fourth proportional to 625.71, 863.47 and 345.94 is: 477.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.71 : 863.47 = 345.94 : x
  2. Step 2: Convert to fraction form
    625.71/863.47 = 345.94/x
  3. Step 3: Cross multiply
    625.71x = 863.47 × 345.94
  4. Step 4: Simplify right side
    625.71x = 298,707.73
  5. Step 5: Solve for x
    x = 298,707.73/625.71
  6. Step 6: Final answer
    x = 477.39

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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.