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Finding the Fourth Proportional to 625.43, 863.07 and 345.65

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Solution

The fourth proportional to 625.43, 863.07 and 345.65 is: 476.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.43 : 863.07 = 345.65 : x
  2. Step 2: Convert to fraction form
    625.43/863.07 = 345.65/x
  3. Step 3: Cross multiply
    625.43x = 863.07 × 345.65
  4. Step 4: Simplify right side
    625.43x = 298,322.30
  5. Step 5: Solve for x
    x = 298,322.30/625.43
  6. Step 6: Final answer
    x = 476.99

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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.