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Finding the Third Proportional to 399.75 and 568.50

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Solution

The third proportional to 399.75 and 568.50 is: 808.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.75 : 568.50 = 568.50 : x
  2. Step 2: Convert to fraction form
    399.75/568.50 = 568.50/x
  3. Step 3: Cross multiply
    399.75x = 568.50 × 568.50
  4. Step 4: Simplify right side
    399.75x = 323,192.25
  5. Step 5: Solve for x
    x = 323,192.25/399.75
  6. Step 6: Final answer
    x = 808.49

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.