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Finding the Third Proportional to 318.94 and 455.63

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Solution

The third proportional to 318.94 and 455.63 is: 650.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.94 : 455.63 = 455.63 : x
  2. Step 2: Convert to fraction form
    318.94/455.63 = 455.63/x
  3. Step 3: Cross multiply
    318.94x = 455.63 × 455.63
  4. Step 4: Simplify right side
    318.94x = 207,594.14
  5. Step 5: Solve for x
    x = 207,594.14/318.94
  6. Step 6: Final answer
    x = 650.89

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.