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Finding the Fourth Proportional to 200.85, 301.28 and 70.85

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Solution

The fourth proportional to 200.85, 301.28 and 70.85 is: 106.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.85 : 301.28 = 70.85 : x
  2. Step 2: Convert to fraction form
    200.85/301.28 = 70.85/x
  3. Step 3: Cross multiply
    200.85x = 301.28 × 70.85
  4. Step 4: Simplify right side
    200.85x = 21,343.83
  5. Step 5: Solve for x
    x = 21,343.83/200.85
  6. Step 6: Final answer
    x = 106.27

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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.