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Finding the Fourth Proportional to 200.65, 300.79 and 103.02

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Solution

The fourth proportional to 200.65, 300.79 and 103.02 is: 154.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.65 : 300.79 = 103.02 : x
  2. Step 2: Convert to fraction form
    200.65/300.79 = 103.02/x
  3. Step 3: Cross multiply
    200.65x = 300.79 × 103.02
  4. Step 4: Simplify right side
    200.65x = 30,987.39
  5. Step 5: Solve for x
    x = 30,987.39/200.65
  6. Step 6: Final answer
    x = 154.44

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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.