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Finding the Third Proportional to 421.25 and 923.50

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Solution

The third proportional to 421.25 and 923.50 is: 2,024.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.25 : 923.50 = 923.50 : x
  2. Step 2: Convert to fraction form
    421.25/923.50 = 923.50/x
  3. Step 3: Cross multiply
    421.25x = 923.50 × 923.50
  4. Step 4: Simplify right side
    421.25x = 852,852.25
  5. Step 5: Solve for x
    x = 852,852.25/421.25
  6. Step 6: Final answer
    x = 2,024.58

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.