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Finding the Third Proportional to 318.75 and 448.50

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Solution

The third proportional to 318.75 and 448.50 is: 631.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.75 : 448.50 = 448.50 : x
  2. Step 2: Convert to fraction form
    318.75/448.50 = 448.50/x
  3. Step 3: Cross multiply
    318.75x = 448.50 × 448.50
  4. Step 4: Simplify right side
    318.75x = 201,152.25
  5. Step 5: Solve for x
    x = 201,152.25/318.75
  6. Step 6: Final answer
    x = 631.07

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.