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Finding the Fourth Proportional to 310.55, 465.71 and 127.88

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Solution

The fourth proportional to 310.55, 465.71 and 127.88 is: 191.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.55 : 465.71 = 127.88 : x
  2. Step 2: Convert to fraction form
    310.55/465.71 = 127.88/x
  3. Step 3: Cross multiply
    310.55x = 465.71 × 127.88
  4. Step 4: Simplify right side
    310.55x = 59,554.36
  5. Step 5: Solve for x
    x = 59,554.36/310.55
  6. Step 6: Final answer
    x = 191.77

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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.