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Finding the Third Proportional to 304.70 and 646.42

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Solution

The third proportional to 304.70 and 646.42 is: 1,371.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.70 : 646.42 = 646.42 : x
  2. Step 2: Convert to fraction form
    304.70/646.42 = 646.42/x
  3. Step 3: Cross multiply
    304.70x = 646.42 × 646.42
  4. Step 4: Simplify right side
    304.70x = 417,856.19
  5. Step 5: Solve for x
    x = 417,856.19/304.70
  6. Step 6: Final answer
    x = 1,371.37

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.