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Finding the Fourth Proportional to 361.64, 542.54 and 145.23

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Solution

The fourth proportional to 361.64, 542.54 and 145.23 is: 217.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.64 : 542.54 = 145.23 : x
  2. Step 2: Convert to fraction form
    361.64/542.54 = 145.23/x
  3. Step 3: Cross multiply
    361.64x = 542.54 × 145.23
  4. Step 4: Simplify right side
    361.64x = 78,793.45
  5. Step 5: Solve for x
    x = 78,793.45/361.64
  6. Step 6: Final answer
    x = 217.88

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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.