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Finding the Fourth Proportional to 634.09, 949.80 and 402.86

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Solution

The fourth proportional to 634.09, 949.80 and 402.86 is: 603.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.09 : 949.80 = 402.86 : x
  2. Step 2: Convert to fraction form
    634.09/949.80 = 402.86/x
  3. Step 3: Cross multiply
    634.09x = 949.80 × 402.86
  4. Step 4: Simplify right side
    634.09x = 382,636.43
  5. Step 5: Solve for x
    x = 382,636.43/634.09
  6. Step 6: Final answer
    x = 603.44

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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.