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Finding the Fourth Proportional to 360.46, 540.70 and 129.30

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Solution

The fourth proportional to 360.46, 540.70 and 129.30 is: 193.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.46 : 540.70 = 129.30 : x
  2. Step 2: Convert to fraction form
    360.46/540.70 = 129.30/x
  3. Step 3: Cross multiply
    360.46x = 540.70 × 129.30
  4. Step 4: Simplify right side
    360.46x = 69,912.51
  5. Step 5: Solve for x
    x = 69,912.51/360.46
  6. Step 6: Final answer
    x = 193.95

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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.