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Finding the Fourth Proportional to 540.38, 810.58 and 251.78

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Solution

The fourth proportional to 540.38, 810.58 and 251.78 is: 377.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.38 : 810.58 = 251.78 : x
  2. Step 2: Convert to fraction form
    540.38/810.58 = 251.78/x
  3. Step 3: Cross multiply
    540.38x = 810.58 × 251.78
  4. Step 4: Simplify right side
    540.38x = 204,087.83
  5. Step 5: Solve for x
    x = 204,087.83/540.38
  6. Step 6: Final answer
    x = 377.67

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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.