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Finding the Third Proportional to 307.55 and 632.18

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Solution

The third proportional to 307.55 and 632.18 is: 1,299.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.55 : 632.18 = 632.18 : x
  2. Step 2: Convert to fraction form
    307.55/632.18 = 632.18/x
  3. Step 3: Cross multiply
    307.55x = 632.18 × 632.18
  4. Step 4: Simplify right side
    307.55x = 399,651.16
  5. Step 5: Solve for x
    x = 399,651.16/307.55
  6. Step 6: Final answer
    x = 1,299.48

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.