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Finding the Third Proportional to 200.63 and 358.69

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Solution

The third proportional to 200.63 and 358.69 is: 641.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.63 : 358.69 = 358.69 : x
  2. Step 2: Convert to fraction form
    200.63/358.69 = 358.69/x
  3. Step 3: Cross multiply
    200.63x = 358.69 × 358.69
  4. Step 4: Simplify right side
    200.63x = 128,656.72
  5. Step 5: Solve for x
    x = 128,656.72/200.63
  6. Step 6: Final answer
    x = 641.28

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.