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Finding the Third Proportional to 243,772 and 389,271

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Solution

The third proportional to 243,772 and 389,271 is: 621,613.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,772 : 389,271 = 389,271 : x
  2. Step 2: Convert to fraction form
    243,772/389,271 = 389,271/x
  3. Step 3: Cross multiply
    243,772x = 389,271 × 389,271
  4. Step 4: Simplify right side
    243,772x = 151,531,911,441
  5. Step 5: Solve for x
    x = 151,531,911,441/243,772
  6. Step 6: Final answer
    x = 621,613.28

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.