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Finding the Fourth Proportional to 540.38, 810.50 and 247.80

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Solution

The fourth proportional to 540.38, 810.50 and 247.80 is: 371.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.38 : 810.50 = 247.80 : x
  2. Step 2: Convert to fraction form
    540.38/810.50 = 247.80/x
  3. Step 3: Cross multiply
    540.38x = 810.50 × 247.80
  4. Step 4: Simplify right side
    540.38x = 200,841.90
  5. Step 5: Solve for x
    x = 200,841.90/540.38
  6. Step 6: Final answer
    x = 371.67

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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.