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Finding the Third Proportional to 245.63 and 385.31

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Solution

The third proportional to 245.63 and 385.31 is: 604.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.63 : 385.31 = 385.31 : x
  2. Step 2: Convert to fraction form
    245.63/385.31 = 385.31/x
  3. Step 3: Cross multiply
    245.63x = 385.31 × 385.31
  4. Step 4: Simplify right side
    245.63x = 148,465.72
  5. Step 5: Solve for x
    x = 148,465.72/245.63
  6. Step 6: Final answer
    x = 604.44

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.