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Finding the Fourth Proportional to 499.49, 749.28 and 210.95

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Solution

The fourth proportional to 499.49, 749.28 and 210.95 is: 316.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.49 : 749.28 = 210.95 : x
  2. Step 2: Convert to fraction form
    499.49/749.28 = 210.95/x
  3. Step 3: Cross multiply
    499.49x = 749.28 × 210.95
  4. Step 4: Simplify right side
    499.49x = 158,060.62
  5. Step 5: Solve for x
    x = 158,060.62/499.49
  6. Step 6: Final answer
    x = 316.44

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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.