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Finding the Third Proportional to 211,572 and 440,640

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Solution

The third proportional to 211,572 and 440,640 is: 917,718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,572 : 440,640 = 440,640 : x
  2. Step 2: Convert to fraction form
    211,572/440,640 = 440,640/x
  3. Step 3: Cross multiply
    211,572x = 440,640 × 440,640
  4. Step 4: Simplify right side
    211,572x = 194,163,609,600
  5. Step 5: Solve for x
    x = 194,163,609,600/211,572
  6. Step 6: Final answer
    x = 917,718.84

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.