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Finding the Fourth Proportional to 625.74, 863.51 and 345.99

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Solution

The fourth proportional to 625.74, 863.51 and 345.99 is: 477.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.74 : 863.51 = 345.99 : x
  2. Step 2: Convert to fraction form
    625.74/863.51 = 345.99/x
  3. Step 3: Cross multiply
    625.74x = 863.51 × 345.99
  4. Step 4: Simplify right side
    625.74x = 298,767.12
  5. Step 5: Solve for x
    x = 298,767.12/625.74
  6. Step 6: Final answer
    x = 477.46

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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.