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Finding the Fourth Proportional to 543.28, 814.88 and 361.80

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Solution

The fourth proportional to 543.28, 814.88 and 361.80 is: 542.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.28 : 814.88 = 361.80 : x
  2. Step 2: Convert to fraction form
    543.28/814.88 = 361.80/x
  3. Step 3: Cross multiply
    543.28x = 814.88 × 361.80
  4. Step 4: Simplify right side
    543.28x = 294,823.58
  5. Step 5: Solve for x
    x = 294,823.58/543.28
  6. Step 6: Final answer
    x = 542.67

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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.