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Finding the Fourth Proportional to 310.62, 465.48 and 127.92

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Solution

The fourth proportional to 310.62, 465.48 and 127.92 is: 191.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.62 : 465.48 = 127.92 : x
  2. Step 2: Convert to fraction form
    310.62/465.48 = 127.92/x
  3. Step 3: Cross multiply
    310.62x = 465.48 × 127.92
  4. Step 4: Simplify right side
    310.62x = 59,544.20
  5. Step 5: Solve for x
    x = 59,544.20/310.62
  6. Step 6: Final answer
    x = 191.69

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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.