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Finding the Third Proportional to 262,620 and 407,430

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Solution

The third proportional to 262,620 and 407,430 is: 632,088.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,620 : 407,430 = 407,430 : x
  2. Step 2: Convert to fraction form
    262,620/407,430 = 407,430/x
  3. Step 3: Cross multiply
    262,620x = 407,430 × 407,430
  4. Step 4: Simplify right side
    262,620x = 165,999,204,900
  5. Step 5: Solve for x
    x = 165,999,204,900/262,620
  6. Step 6: Final answer
    x = 632,088.97

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.