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Finding the Fourth Proportional to 499.48, 749.24 and 210.72

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Solution

The fourth proportional to 499.48, 749.24 and 210.72 is: 316.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.48 : 749.24 = 210.72 : x
  2. Step 2: Convert to fraction form
    499.48/749.24 = 210.72/x
  3. Step 3: Cross multiply
    499.48x = 749.24 × 210.72
  4. Step 4: Simplify right side
    499.48x = 157,879.85
  5. Step 5: Solve for x
    x = 157,879.85/499.48
  6. Step 6: Final answer
    x = 316.09

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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.