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Finding the Third Proportional to 420.75 and 601

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Solution

The third proportional to 420.75 and 601 is: 858.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.75 : 601 = 601 : x
  2. Step 2: Convert to fraction form
    420.75/601 = 601/x
  3. Step 3: Cross multiply
    420.75x = 601 × 601
  4. Step 4: Simplify right side
    420.75x = 361,201
  5. Step 5: Solve for x
    x = 361,201/420.75
  6. Step 6: Final answer
    x = 858.47

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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.