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Finding the Fourth Proportional to 310.05, 465.12 and 127.38

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Solution

The fourth proportional to 310.05, 465.12 and 127.38 is: 191.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.05 : 465.12 = 127.38 : x
  2. Step 2: Convert to fraction form
    310.05/465.12 = 127.38/x
  3. Step 3: Cross multiply
    310.05x = 465.12 × 127.38
  4. Step 4: Simplify right side
    310.05x = 59,246.99
  5. Step 5: Solve for x
    x = 59,246.99/310.05
  6. Step 6: Final answer
    x = 191.09

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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.