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Finding the Fourth Proportional to 609.50, 912.72 and 499.56

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Solution

The fourth proportional to 609.50, 912.72 and 499.56 is: 748.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.50 : 912.72 = 499.56 : x
  2. Step 2: Convert to fraction form
    609.50/912.72 = 499.56/x
  3. Step 3: Cross multiply
    609.50x = 912.72 × 499.56
  4. Step 4: Simplify right side
    609.50x = 455,958.40
  5. Step 5: Solve for x
    x = 455,958.40/609.50
  6. Step 6: Final answer
    x = 748.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.