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Finding the Third Proportional to 432,172 and 654,220

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Solution

The third proportional to 432,172 and 654,220 is: 990,355.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,172 : 654,220 = 654,220 : x
  2. Step 2: Convert to fraction form
    432,172/654,220 = 654,220/x
  3. Step 3: Cross multiply
    432,172x = 654,220 × 654,220
  4. Step 4: Simplify right side
    432,172x = 428,003,808,400
  5. Step 5: Solve for x
    x = 428,003,808,400/432,172
  6. Step 6: Final answer
    x = 990,355.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.