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Finding the Third Proportional to 421,929.75 and 909,827.25

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Solution

The third proportional to 421,929.75 and 909,827.25 is: 1,961,903.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,929.75 : 909,827.25 = 909,827.25 : x
  2. Step 2: Convert to fraction form
    421,929.75/909,827.25 = 909,827.25/x
  3. Step 3: Cross multiply
    421,929.75x = 909,827.25 × 909,827.25
  4. Step 4: Simplify right side
    421,929.75x = 827,785,624,842.56
  5. Step 5: Solve for x
    x = 827,785,624,842.56/421,929.75
  6. Step 6: Final answer
    x = 1,961,903.91

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.