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Finding the Fourth Proportional to 499.62, 689.50 and 394.44

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Solution

The fourth proportional to 499.62, 689.50 and 394.44 is: 544.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.62 : 689.50 = 394.44 : x
  2. Step 2: Convert to fraction form
    499.62/689.50 = 394.44/x
  3. Step 3: Cross multiply
    499.62x = 689.50 × 394.44
  4. Step 4: Simplify right side
    499.62x = 271,966.38
  5. Step 5: Solve for x
    x = 271,966.38/499.62
  6. Step 6: Final answer
    x = 544.35

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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.