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Finding the Fourth Proportional to 625.68, 863.43 and 345.93

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Solution

The fourth proportional to 625.68, 863.43 and 345.93 is: 477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.68 : 863.43 = 345.93 : x
  2. Step 2: Convert to fraction form
    625.68/863.43 = 345.93/x
  3. Step 3: Cross multiply
    625.68x = 863.43 × 345.93
  4. Step 4: Simplify right side
    625.68x = 298,686.34
  5. Step 5: Solve for x
    x = 298,686.34/625.68
  6. Step 6: Final answer
    x = 477.38

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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.