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Finding the Fourth Proportional to 499.96, 690.17 and 300.88

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Solution

The fourth proportional to 499.96, 690.17 and 300.88 is: 415.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.96 : 690.17 = 300.88 : x
  2. Step 2: Convert to fraction form
    499.96/690.17 = 300.88/x
  3. Step 3: Cross multiply
    499.96x = 690.17 × 300.88
  4. Step 4: Simplify right side
    499.96x = 207,658.35
  5. Step 5: Solve for x
    x = 207,658.35/499.96
  6. Step 6: Final answer
    x = 415.35

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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.