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Finding the Fourth Proportional to 625.75, 863.54 and 442.07

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Solution

The fourth proportional to 625.75, 863.54 and 442.07 is: 610.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.75 : 863.54 = 442.07 : x
  2. Step 2: Convert to fraction form
    625.75/863.54 = 442.07/x
  3. Step 3: Cross multiply
    625.75x = 863.54 × 442.07
  4. Step 4: Simplify right side
    625.75x = 381,742.92
  5. Step 5: Solve for x
    x = 381,742.92/625.75
  6. Step 6: Final answer
    x = 610.06

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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.