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Finding the Third Proportional to 309,772 and 455,582

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Solution

The third proportional to 309,772 and 455,582 is: 670,024.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,772 : 455,582 = 455,582 : x
  2. Step 2: Convert to fraction form
    309,772/455,582 = 455,582/x
  3. Step 3: Cross multiply
    309,772x = 455,582 × 455,582
  4. Step 4: Simplify right side
    309,772x = 207,554,958,724
  5. Step 5: Solve for x
    x = 207,554,958,724/309,772
  6. Step 6: Final answer
    x = 670,024.92

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.