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Finding the Fourth Proportional to 200.40, 299.89 and 123.38

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Solution

The fourth proportional to 200.40, 299.89 and 123.38 is: 184.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.40 : 299.89 = 123.38 : x
  2. Step 2: Convert to fraction form
    200.40/299.89 = 123.38/x
  3. Step 3: Cross multiply
    200.40x = 299.89 × 123.38
  4. Step 4: Simplify right side
    200.40x = 36,999.81
  5. Step 5: Solve for x
    x = 36,999.81/200.40
  6. Step 6: Final answer
    x = 184.63

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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.