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Finding the Fourth Proportional to 201.40, 300.65 and 187.16

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Solution

The fourth proportional to 201.40, 300.65 and 187.16 is: 279.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.40 : 300.65 = 187.16 : x
  2. Step 2: Convert to fraction form
    201.40/300.65 = 187.16/x
  3. Step 3: Cross multiply
    201.40x = 300.65 × 187.16
  4. Step 4: Simplify right side
    201.40x = 56,268.91
  5. Step 5: Solve for x
    x = 56,268.91/201.40
  6. Step 6: Final answer
    x = 279.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.