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Finding the Fourth Proportional to 625.38, 857.94 and 620.34

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Solution

The fourth proportional to 625.38, 857.94 and 620.34 is: 851.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.38 : 857.94 = 620.34 : x
  2. Step 2: Convert to fraction form
    625.38/857.94 = 620.34/x
  3. Step 3: Cross multiply
    625.38x = 857.94 × 620.34
  4. Step 4: Simplify right side
    625.38x = 532,214.50
  5. Step 5: Solve for x
    x = 532,214.50/625.38
  6. Step 6: Final answer
    x = 851.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.