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Finding the Third Proportional to 288.98 and 633.94

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Solution

The third proportional to 288.98 and 633.94 is: 1,390.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.98 : 633.94 = 633.94 : x
  2. Step 2: Convert to fraction form
    288.98/633.94 = 633.94/x
  3. Step 3: Cross multiply
    288.98x = 633.94 × 633.94
  4. Step 4: Simplify right side
    288.98x = 401,876.75
  5. Step 5: Solve for x
    x = 401,876.75/288.98
  6. Step 6: Final answer
    x = 1,390.65

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.