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Finding the Fourth Proportional to 200.43, 300.68 and 70.47

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Solution

The fourth proportional to 200.43, 300.68 and 70.47 is: 105.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.43 : 300.68 = 70.47 : x
  2. Step 2: Convert to fraction form
    200.43/300.68 = 70.47/x
  3. Step 3: Cross multiply
    200.43x = 300.68 × 70.47
  4. Step 4: Simplify right side
    200.43x = 21,188.57
  5. Step 5: Solve for x
    x = 21,188.57/200.43
  6. Step 6: Final answer
    x = 105.72

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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.