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Finding the Fourth Proportional to 201.12, 277.16 and 145.75

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Solution

The fourth proportional to 201.12, 277.16 and 145.75 is: 200.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.12 : 277.16 = 145.75 : x
  2. Step 2: Convert to fraction form
    201.12/277.16 = 145.75/x
  3. Step 3: Cross multiply
    201.12x = 277.16 × 145.75
  4. Step 4: Simplify right side
    201.12x = 40,395.17
  5. Step 5: Solve for x
    x = 40,395.17/201.12
  6. Step 6: Final answer
    x = 200.85

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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.