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Finding the Fourth Proportional to 499.08, 748.31 and 206.77

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Solution

The fourth proportional to 499.08, 748.31 and 206.77 is: 310.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.08 : 748.31 = 206.77 : x
  2. Step 2: Convert to fraction form
    499.08/748.31 = 206.77/x
  3. Step 3: Cross multiply
    499.08x = 748.31 × 206.77
  4. Step 4: Simplify right side
    499.08x = 154,726.32
  5. Step 5: Solve for x
    x = 154,726.32/499.08
  6. Step 6: Final answer
    x = 310.03

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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.