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Finding the Third Proportional to 399.25 and 602.50

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Solution

The third proportional to 399.25 and 602.50 is: 909.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.25 : 602.50 = 602.50 : x
  2. Step 2: Convert to fraction form
    399.25/602.50 = 602.50/x
  3. Step 3: Cross multiply
    399.25x = 602.50 × 602.50
  4. Step 4: Simplify right side
    399.25x = 363,006.25
  5. Step 5: Solve for x
    x = 363,006.25/399.25
  6. Step 6: Final answer
    x = 909.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.