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Finding the Fourth Proportional to 625.96, 938.86 and 394.15

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Solution

The fourth proportional to 625.96, 938.86 and 394.15 is: 591.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.96 : 938.86 = 394.15 : x
  2. Step 2: Convert to fraction form
    625.96/938.86 = 394.15/x
  3. Step 3: Cross multiply
    625.96x = 938.86 × 394.15
  4. Step 4: Simplify right side
    625.96x = 370,051.67
  5. Step 5: Solve for x
    x = 370,051.67/625.96
  6. Step 6: Final answer
    x = 591.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.