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Finding the Fourth Proportional to 361.20, 541.86 and 117.72

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Solution

The fourth proportional to 361.20, 541.86 and 117.72 is: 176.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.20 : 541.86 = 117.72 : x
  2. Step 2: Convert to fraction form
    361.20/541.86 = 117.72/x
  3. Step 3: Cross multiply
    361.20x = 541.86 × 117.72
  4. Step 4: Simplify right side
    361.20x = 63,787.76
  5. Step 5: Solve for x
    x = 63,787.76/361.20
  6. Step 6: Final answer
    x = 176.60

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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.