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Finding the Third Proportional to 307.81 and 663.94

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Solution

The third proportional to 307.81 and 663.94 is: 1,432.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.81 : 663.94 = 663.94 : x
  2. Step 2: Convert to fraction form
    307.81/663.94 = 663.94/x
  3. Step 3: Cross multiply
    307.81x = 663.94 × 663.94
  4. Step 4: Simplify right side
    307.81x = 440,813.00
  5. Step 5: Solve for x
    x = 440,813.00/307.81
  6. Step 6: Final answer
    x = 1,432.08

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.