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Finding the Fourth Proportional to 201.27, 277.80 and 127.65

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Solution

The fourth proportional to 201.27, 277.80 and 127.65 is: 176.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.27 : 277.80 = 127.65 : x
  2. Step 2: Convert to fraction form
    201.27/277.80 = 127.65/x
  3. Step 3: Cross multiply
    201.27x = 277.80 × 127.65
  4. Step 4: Simplify right side
    201.27x = 35,461.17
  5. Step 5: Solve for x
    x = 35,461.17/201.27
  6. Step 6: Final answer
    x = 176.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.