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Finding the Fourth Proportional to 499.32, 749.01 and 210.78

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Solution

The fourth proportional to 499.32, 749.01 and 210.78 is: 316.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.32 : 749.01 = 210.78 : x
  2. Step 2: Convert to fraction form
    499.32/749.01 = 210.78/x
  3. Step 3: Cross multiply
    499.32x = 749.01 × 210.78
  4. Step 4: Simplify right side
    499.32x = 157,876.33
  5. Step 5: Solve for x
    x = 157,876.33/499.32
  6. Step 6: Final answer
    x = 316.18

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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.