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Finding the Fourth Proportional to 361.04, 540.72 and 216.80

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Solution

The fourth proportional to 361.04, 540.72 and 216.80 is: 324.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.04 : 540.72 = 216.80 : x
  2. Step 2: Convert to fraction form
    361.04/540.72 = 216.80/x
  3. Step 3: Cross multiply
    361.04x = 540.72 × 216.80
  4. Step 4: Simplify right side
    361.04x = 117,228.10
  5. Step 5: Solve for x
    x = 117,228.10/361.04
  6. Step 6: Final answer
    x = 324.70

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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.