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Finding the Fourth Proportional to 200.48, 300.44 and 142.64

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Solution

The fourth proportional to 200.48, 300.44 and 142.64 is: 213.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.48 : 300.44 = 142.64 : x
  2. Step 2: Convert to fraction form
    200.48/300.44 = 142.64/x
  3. Step 3: Cross multiply
    200.48x = 300.44 × 142.64
  4. Step 4: Simplify right side
    200.48x = 42,854.76
  5. Step 5: Solve for x
    x = 42,854.76/200.48
  6. Step 6: Final answer
    x = 213.76

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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.