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Finding the Fourth Proportional to 499.56, 690.38 and 375.64

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Solution

The fourth proportional to 499.56, 690.38 and 375.64 is: 519.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.56 : 690.38 = 375.64 : x
  2. Step 2: Convert to fraction form
    499.56/690.38 = 375.64/x
  3. Step 3: Cross multiply
    499.56x = 690.38 × 375.64
  4. Step 4: Simplify right side
    499.56x = 259,334.34
  5. Step 5: Solve for x
    x = 259,334.34/499.56
  6. Step 6: Final answer
    x = 519.13

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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.