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Finding the Fourth Proportional to 625.90, 863.80 and 346.19

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Solution

The fourth proportional to 625.90, 863.80 and 346.19 is: 477.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.90 : 863.80 = 346.19 : x
  2. Step 2: Convert to fraction form
    625.90/863.80 = 346.19/x
  3. Step 3: Cross multiply
    625.90x = 863.80 × 346.19
  4. Step 4: Simplify right side
    625.90x = 299,040.22
  5. Step 5: Solve for x
    x = 299,040.22/625.90
  6. Step 6: Final answer
    x = 477.78

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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.