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Finding the Fourth Proportional to 310.69, 465.91 and 115.70

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Solution

The fourth proportional to 310.69, 465.91 and 115.70 is: 173.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.69 : 465.91 = 115.70 : x
  2. Step 2: Convert to fraction form
    310.69/465.91 = 115.70/x
  3. Step 3: Cross multiply
    310.69x = 465.91 × 115.70
  4. Step 4: Simplify right side
    310.69x = 53,905.79
  5. Step 5: Solve for x
    x = 53,905.79/310.69
  6. Step 6: Final answer
    x = 173.50

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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.