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Finding the Fourth Proportional to 499.12, 749.73 and 485.44

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Solution

The fourth proportional to 499.12, 749.73 and 485.44 is: 729.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.12 : 749.73 = 485.44 : x
  2. Step 2: Convert to fraction form
    499.12/749.73 = 485.44/x
  3. Step 3: Cross multiply
    499.12x = 749.73 × 485.44
  4. Step 4: Simplify right side
    499.12x = 363,948.93
  5. Step 5: Solve for x
    x = 363,948.93/499.12
  6. Step 6: Final answer
    x = 729.18

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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.