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Finding the Third Proportional to 205,998 and 434,140

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Solution

The third proportional to 205,998 and 434,140 is: 914,948.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,998 : 434,140 = 434,140 : x
  2. Step 2: Convert to fraction form
    205,998/434,140 = 434,140/x
  3. Step 3: Cross multiply
    205,998x = 434,140 × 434,140
  4. Step 4: Simplify right side
    205,998x = 188,477,539,600
  5. Step 5: Solve for x
    x = 188,477,539,600/205,998
  6. Step 6: Final answer
    x = 914,948.40

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.