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Finding the Fourth Proportional to 202.05, 302.31 and 133.74

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Solution

The fourth proportional to 202.05, 302.31 and 133.74 is: 200.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.05 : 302.31 = 133.74 : x
  2. Step 2: Convert to fraction form
    202.05/302.31 = 133.74/x
  3. Step 3: Cross multiply
    202.05x = 302.31 × 133.74
  4. Step 4: Simplify right side
    202.05x = 40,430.94
  5. Step 5: Solve for x
    x = 40,430.94/202.05
  6. Step 6: Final answer
    x = 200.10

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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.