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Finding the Third Proportional to 306,396 and 457,740

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Solution

The third proportional to 306,396 and 457,740 is: 683,840.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,396 : 457,740 = 457,740 : x
  2. Step 2: Convert to fraction form
    306,396/457,740 = 457,740/x
  3. Step 3: Cross multiply
    306,396x = 457,740 × 457,740
  4. Step 4: Simplify right side
    306,396x = 209,525,907,600
  5. Step 5: Solve for x
    x = 209,525,907,600/306,396
  6. Step 6: Final answer
    x = 683,840.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.