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Finding the Fourth Proportional to 625.80, 863.60 and 346.02

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Solution

The fourth proportional to 625.80, 863.60 and 346.02 is: 477.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.80 : 863.60 = 346.02 : x
  2. Step 2: Convert to fraction form
    625.80/863.60 = 346.02/x
  3. Step 3: Cross multiply
    625.80x = 863.60 × 346.02
  4. Step 4: Simplify right side
    625.80x = 298,822.87
  5. Step 5: Solve for x
    x = 298,822.87/625.80
  6. Step 6: Final answer
    x = 477.51

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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.