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Finding the Third Proportional to 201,420 and 438,803

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Solution

The third proportional to 201,420 and 438,803 is: 955,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,420 : 438,803 = 438,803 : x
  2. Step 2: Convert to fraction form
    201,420/438,803 = 438,803/x
  3. Step 3: Cross multiply
    201,420x = 438,803 × 438,803
  4. Step 4: Simplify right side
    201,420x = 192,548,072,809
  5. Step 5: Solve for x
    x = 192,548,072,809/201,420
  6. Step 6: Final answer
    x = 955,953.10

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.