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Finding the Fourth Proportional to 200.15, 299.96 and 135.05

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Solution

The fourth proportional to 200.15, 299.96 and 135.05 is: 202.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.15 : 299.96 = 135.05 : x
  2. Step 2: Convert to fraction form
    200.15/299.96 = 135.05/x
  3. Step 3: Cross multiply
    200.15x = 299.96 × 135.05
  4. Step 4: Simplify right side
    200.15x = 40,509.60
  5. Step 5: Solve for x
    x = 40,509.60/200.15
  6. Step 6: Final answer
    x = 202.40

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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.