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Finding the Fourth Proportional to 509.95, 764.88 and 249.85

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Solution

The fourth proportional to 509.95, 764.88 and 249.85 is: 374.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.95 : 764.88 = 249.85 : x
  2. Step 2: Convert to fraction form
    509.95/764.88 = 249.85/x
  3. Step 3: Cross multiply
    509.95x = 764.88 × 249.85
  4. Step 4: Simplify right side
    509.95x = 191,105.27
  5. Step 5: Solve for x
    x = 191,105.27/509.95
  6. Step 6: Final answer
    x = 374.75

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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.