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Finding the Fourth Proportional to 361.76, 542.50 and 130.57

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Solution

The fourth proportional to 361.76, 542.50 and 130.57 is: 195.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.76 : 542.50 = 130.57 : x
  2. Step 2: Convert to fraction form
    361.76/542.50 = 130.57/x
  3. Step 3: Cross multiply
    361.76x = 542.50 × 130.57
  4. Step 4: Simplify right side
    361.76x = 70,833.90
  5. Step 5: Solve for x
    x = 70,833.90/361.76
  6. Step 6: Final answer
    x = 195.80

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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.