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Finding the Fourth Proportional to 499.06, 689.11 and 394.07

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Solution

The fourth proportional to 499.06, 689.11 and 394.07 is: 544.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.06 : 689.11 = 394.07 : x
  2. Step 2: Convert to fraction form
    499.06/689.11 = 394.07/x
  3. Step 3: Cross multiply
    499.06x = 689.11 × 394.07
  4. Step 4: Simplify right side
    499.06x = 271,553.15
  5. Step 5: Solve for x
    x = 271,553.15/499.06
  6. Step 6: Final answer
    x = 544.13

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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.