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Finding the Fourth Proportional to 625.44, 862.86 and 389.26

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Solution

The fourth proportional to 625.44, 862.86 and 389.26 is: 537.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.44 : 862.86 = 389.26 : x
  2. Step 2: Convert to fraction form
    625.44/862.86 = 389.26/x
  3. Step 3: Cross multiply
    625.44x = 862.86 × 389.26
  4. Step 4: Simplify right side
    625.44x = 335,876.88
  5. Step 5: Solve for x
    x = 335,876.88/625.44
  6. Step 6: Final answer
    x = 537.02

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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.