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Finding the Fourth Proportional to 499.64, 689.92 and 375.44

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Solution

The fourth proportional to 499.64, 689.92 and 375.44 is: 518.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.64 : 689.92 = 375.44 : x
  2. Step 2: Convert to fraction form
    499.64/689.92 = 375.44/x
  3. Step 3: Cross multiply
    499.64x = 689.92 × 375.44
  4. Step 4: Simplify right side
    499.64x = 259,019.18
  5. Step 5: Solve for x
    x = 259,019.18/499.64
  6. Step 6: Final answer
    x = 518.42

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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.