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Finding the Fourth Proportional to 275.16, 378.72 and 201.36

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Solution

The fourth proportional to 275.16, 378.72 and 201.36 is: 277.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.16 : 378.72 = 201.36 : x
  2. Step 2: Convert to fraction form
    275.16/378.72 = 201.36/x
  3. Step 3: Cross multiply
    275.16x = 378.72 × 201.36
  4. Step 4: Simplify right side
    275.16x = 76,259.06
  5. Step 5: Solve for x
    x = 76,259.06/275.16
  6. Step 6: Final answer
    x = 277.14

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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.