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Finding the Fourth Proportional to 361.86, 542.85 and 130.68

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Solution

The fourth proportional to 361.86, 542.85 and 130.68 is: 196.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.86 : 542.85 = 130.68 : x
  2. Step 2: Convert to fraction form
    361.86/542.85 = 130.68/x
  3. Step 3: Cross multiply
    361.86x = 542.85 × 130.68
  4. Step 4: Simplify right side
    361.86x = 70,939.64
  5. Step 5: Solve for x
    x = 70,939.64/361.86
  6. Step 6: Final answer
    x = 196.04

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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.