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Finding the Fourth Proportional to 360.60, 540.70 and 129.48

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Solution

The fourth proportional to 360.60, 540.70 and 129.48 is: 194.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.60 : 540.70 = 129.48 : x
  2. Step 2: Convert to fraction form
    360.60/540.70 = 129.48/x
  3. Step 3: Cross multiply
    360.60x = 540.70 × 129.48
  4. Step 4: Simplify right side
    360.60x = 70,009.84
  5. Step 5: Solve for x
    x = 70,009.84/360.60
  6. Step 6: Final answer
    x = 194.15

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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.