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Finding the Fourth Proportional to 310.26, 465.41 and 115.20

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Solution

The fourth proportional to 310.26, 465.41 and 115.20 is: 172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.26 : 465.41 = 115.20 : x
  2. Step 2: Convert to fraction form
    310.26/465.41 = 115.20/x
  3. Step 3: Cross multiply
    310.26x = 465.41 × 115.20
  4. Step 4: Simplify right side
    310.26x = 53,615.23
  5. Step 5: Solve for x
    x = 53,615.23/310.26
  6. Step 6: Final answer
    x = 172.81

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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.