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Finding the Fourth Proportional to 310.38, 465.56 and 115.40

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Solution

The fourth proportional to 310.38, 465.56 and 115.40 is: 173.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.38 : 465.56 = 115.40 : x
  2. Step 2: Convert to fraction form
    310.38/465.56 = 115.40/x
  3. Step 3: Cross multiply
    310.38x = 465.56 × 115.40
  4. Step 4: Simplify right side
    310.38x = 53,722.72
  5. Step 5: Solve for x
    x = 53,722.72/310.38
  6. Step 6: Final answer
    x = 173.09

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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.