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Finding the Fourth Proportional to 360.51, 540.71 and 129.32

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Solution

The fourth proportional to 360.51, 540.71 and 129.32 is: 193.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.51 : 540.71 = 129.32 : x
  2. Step 2: Convert to fraction form
    360.51/540.71 = 129.32/x
  3. Step 3: Cross multiply
    360.51x = 540.71 × 129.32
  4. Step 4: Simplify right side
    360.51x = 69,924.62
  5. Step 5: Solve for x
    x = 69,924.62/360.51
  6. Step 6: Final answer
    x = 193.96

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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.