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Finding the Fourth Proportional to 625.62, 863.72 and 492.59

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Solution

The fourth proportional to 625.62, 863.72 and 492.59 is: 680.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.62 : 863.72 = 492.59 : x
  2. Step 2: Convert to fraction form
    625.62/863.72 = 492.59/x
  3. Step 3: Cross multiply
    625.62x = 863.72 × 492.59
  4. Step 4: Simplify right side
    625.62x = 425,453.05
  5. Step 5: Solve for x
    x = 425,453.05/625.62
  6. Step 6: Final answer
    x = 680.05

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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.