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Finding the Third Proportional to 316 and 458

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Solution

The third proportional to 316 and 458 is: 663.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    316 : 458 = 458 : x
  2. Step 2: Convert to fraction form
    316/458 = 458/x
  3. Step 3: Cross multiply
    316x = 458 × 458
  4. Step 4: Simplify right side
    316x = 209,764
  5. Step 5: Solve for x
    x = 209,764/316
  6. Step 6: Final answer
    x = 663.81

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These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.